Answers
The z - score z = (x - μ)/σ equals z = (p' - p)/[√(pq/n)]
What is z-score?The z-score is the statical value used to determine probability in a normal distribution
Given the z-score z = (x - μ)/σ where
x = number of successes in a sample of nμ = np and σ = √npqWe need to show that
z = (p' - p)/√(pq/n)
We proceed as follows
Now, the z-score
z = (x - μ)/σ
Substituting in the values of μ and σ into the equation, we have that
μ = np and σ = √(npq)So, z = (x - μ)/σ
z = (x - np)/[√(npq)]
Now, dividing both the numerator and denominator by n, we have that
z = (x - np)/[√(npq)]
z = (x - np) ÷ n/[√(npq)] ÷ n
z = (x/n - np/n)/[√(npq)/n]
z = (x/n - p)/[√(npq/n²)]
z = (x/n - p)/[√(pq/n)]
Now p' = x/n
So, z = (x/n - p)/[√(pq/n)]
z = (p' - p)/[√(pq/n)]
So, the z - score is z = (p' - p)/[√(pq/n)]
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Related Questions
Which explains whether or not the graph represents a direct variation?
The graph has a constant of variation of 3, so it represents a direct variation.
The graph has a slope of 3, so it represents a direct variation.
The graph has a positive slope, so it does not represent a direct variation.
O The graph does not begin at the origin, so it does not represent a direct variation.
Save and
0
Answers
In a direct variation, a constant ratio exists between two variables. In this case, if we can write the equation of the line in the form y = kx, where k is the constant of variation, then we have a direct variation. The value of k represents the constant ratio between the two variables.
Since the graph has a constant of variation of 3, it means that for every unit increase in x, y increases by a factor of 3. This satisfies the definition of direct variation, and therefore the statement "The graph has a constant of variation of 3, so it represents a direct variation" is correct.
Please answer ASAP I will brainlist
Answers
Answer:
x = - 2 , x = 4
Step-by-step explanation:
the x- intercepts are the points on the x- axis where the graph crosses
the graph crosses the x - axis at - 2 and 4 , then
x- intercepts are x = - 2 , x = 4
Conduct the hypothesis test and provide the test statistic and the critical value, and state the conclusion. A person drilled a hole in a die and filled it with a lead weight, then proceeded to roll it 200 times. Here are the observed frequencies for the outcomes of 1, 2, 3, 4, 5, and 6, respectively: 29, 31, 49, 37, 26, 28. Use a 0.025 significance level to test the claim that the outcomes are not equally likely. Does it appear that the loaded die behaves differently than a fair die?
Answers
The loaded die appears to behave differently from a fair die.Based on the chi-square test, the loaded die does not exhibit equal probabilities for each outcome.
To test the claim that the outcomes of the loaded die are not equally likely, we can use the chi-square goodness-of-fit test. The null hypothesis (H₀) assumes that the outcomes are equally likely, while the alternative hypothesis (H₁) assumes that they are not equally likely.
Step 1: Set up hypotheses
H₀: The outcomes of the die are equally likely.
H₁: The outcomes of the die are not equally likely.
Step 2: Select the significance level
The significance level is given as 0.025, which means we have a two-tailed test and an alpha level of 0.025 for each tail.
Step 3: Compute the test statistic
We calculate the chi-square test statistic using the observed frequencies and the expected frequencies assuming equal probabilities for each outcome.
Expected frequencies (fair die):
1: 200/6 = 33.33
2: 200/6 = 33.33
3: 200/6 = 33.33
4: 200/6 = 33.33
5: 200/6 = 33.33
6: 200/6 = 33.33
Applying the chi-square formula, we get the test statistic:
χ² = ∑((observed - expected)² / expected)
Calculating this value, we get χ² ≈ 13.97.
Step 4: Determine the critical value
Since the significance level is 0.025 and the test is two-tailed, we divide the significance level by 2 to find the critical value associated with each tail. With 5 degrees of freedom (6 categories - 1), the critical value is approximately 11.07.
Step 5: Make a decision
The test statistic (13.97) is greater than the critical value (11.07), which leads us to reject the null hypothesis. Thus, we have evidence to suggest that the outcomes of the loaded die are not equally likely.
The loaded die appears to behave differently from a fair die.
In conclusion, based on the chi-square test, the loaded die does not exhibit equal probabilities for each outcome.
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(cosecx+2)(2cosx-1)=0
Answers
The solutions to the equation (cosec(x)+2)(2cos(x)-1) are x = -π/6 + 2πn, 7π/6 + 2πn, x = π/3 + 2πn, 5π/3 + 2πn.
To solve the given equation, we can make use of zero-product property. The zero-product property states that if the product of the two factors is equal to zero, then one of the factors has to be equal to zero. So, now we will equate each factor to zero to find the solution.
1. (cosec(x)+2) = 0
= cosec(x) = -2
Taking reciprocal on both the sides:
= 1/cosec(x) = -1/2
= sin(x) = -1/2
The solutions for sin(x) = -1/2 occur when x = -π/6 + 2πn and 7π/6 + 2πn, where 'n' is an integer.
2. (2cos(x)-1) = 0
= 2cos(x) = 1
= cos(x) = 1/2
The solutions for cos(x) = 1/2 occur when x = π/3 + 2πn and 5π/3 + 2πn, where 'n' is an integer.
Therefore, the solutions to the equation (cosec(x)+2)(2cos(x)-1) are x = -π/6 + 2πn, 7π/6 + 2πn, x = π/3 + 2πn, 5π/3 + 2πn.
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The complete question is: Find out the possible solutions of the equation (cosecx+2)(2cosx-1)=0.
a
35°
8
X
8
12
35⁰
For the two right triangles
above, explain why
X
12. What
trigonometric ratio is equal to
the two given ratios.
Answers
X = 4√6 because the tangent of 35 degrees is equal to X/8 in the first right triangle and 12/X in the second right triangle.
We have two right triangles with an angle of 35 degrees and side lengths of 8 units and 12 units.
To explain why X = 12, we can use the trigonometric ratio of tangent (tan). In a right triangle, the tangent of an angle is defined as the ratio of the length of the opposite side to the length of the adjacent side.
In the first right triangle, the side opposite to the angle of 35 degrees is X, and the adjacent side is 8 units. So, we have:
tan(35 degrees) = X / 8
Similarly, in the second right triangle, the side opposite to the angle of 35 degrees is 12 units, and the adjacent side is X. So, we have:
tan(35 degrees) = 12 / X
Since the tangent of an angle is the same regardless of the orientation of the triangle, we can equate the two ratios:
X / 8 = 12 / X
To solve for X, we can cross-multiply:
X^2 = 8 * 12
X^2 = 96
Taking the square root of both sides, we get:
X = √96
Simplifying, we have:
X = 4√6
Therefore, X is equal to 4 times the square root of 6.
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state the extrema of the given function
Absolute minimum y= ____
x-intercept? ____
Continuous or discontinuous?
PLS HELP YALL I HAVE FINALS TMR AND IM STRESSED!!!
Answers
The extreme of the function is Absolute minimum
y = -2
x-intercept = 3
What is a discontinuous function?A discontinuous function is a mathematical function that has one or more points in its domain where the function fails to be continuous.
In other words, at these specific points, the function exhibits a discontinuity, indicating a break or jump in the graph.
In the graph, there was discontinuities at points
x = -2, and x = 2
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What is the range of the rational function
Answers
The range of the rational function in this problem is given as follows:
All real values. (fourth option).
How to obtain the domain and range of a function?The domain of a function is defined as the set containing all the values assumed by the independent variable x of the function, which are also all the input values assumed by the function.The range of a function is defined as the set containing all the values assumed by the dependent variable y of the function, which are also all the output values assumed by the function.From the graph of the function given by the image presented at the end of the answer, it assumes all values of y, hence the range is all real values.
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Please awnser asap i
Will brainlist
Answers
The row operation on the matrix [tex]\left[\begin{array}{ccc|c}2&0&0&16\\0&8&0&3\\0&0&5&6\end{array}\right][/tex] is [tex]\left[\begin{array}{ccc|c}1&0&0&8\\0&8&0&3\\0&0&5&6\end{array}\right][/tex]
How to perform the row operation on the matrixFrom the question, we have the following parameters that can be used in our computation:
[tex]\left[\begin{array}{ccc|c}2&0&0&16\\0&8&0&3\\0&0&5&6\end{array}\right][/tex]
The row operation is given as
1/2R₁
This means that we divide the entries on the first row by 2
Using the above as a guide, we have the following:
[tex]\left[\begin{array}{ccc|c}2&0&0&16\\0&8&0&3\\0&0&5&6\end{array}\right] = \left[\begin{array}{ccc|c}1&0&0&8\\0&8&0&3\\0&0&5&6\end{array}\right][/tex]
Hence, the row operation on the matrix is [tex]\left[\begin{array}{ccc|c}2&0&0&16\\0&8&0&3\\0&0&5&6\end{array}\right] = \left[\begin{array}{ccc|c}1&0&0&8\\0&8&0&3\\0&0&5&6\end{array}\right][/tex]
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Work out the height, y, of the isosceles triangle shown below. Give your answer in metres to 2 d.p. 57° 11.5 m Not drawn accurately
Answers
The height of the isosceles triangle is approximately 9.70 meters.
To find the height (y) of an isosceles triangle given its slant height and two angles, we can use trigonometry. Here are the steps to solve this problem:
Start by drawing a sketch of the isosceles triangle. Label the base as "b," the height as "y," and the slant height as "s."
Since the triangle is isosceles, the two base angles are congruent, meaning each angle measures 57 degrees. Label one of these angles as "θ."
We know that the slant height (s) is given as 11.5 m.
Apply the sine function to relate the slant height (s) to the angle (θ) and the height (y) of the triangle. The sine of an angle is defined as the ratio of the opposite side (y) to the hypotenuse (s). So, we have sin(θ) = y/s.
Substitute the given values into the equation: sin(57 degrees) = y/11.5.
Solve the equation for y by multiplying both sides by 11.5: y = 11.5 * sin(57 degrees).
Use a calculator to find the value of sin(57 degrees) and multiply it by 11.5 to obtain the height (y) of the triangle.
Performing the calculation, y = 11.5 * sin(57 degrees) ≈ 9.70 meters (rounded to two decimal places).
Therefore, the height of the isosceles triangle is approximately 9.70 meters.
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Select the correct answer. Which function represents the inverse function of the function f(x)=x^2 +5
Answers
Answer:
f^(-1)(x) = ±√(x - 5).
Step-by-step explanation:
Replace f(x) with y: y = x^2 + 5.
Swap the x and y variables: x = y^2 + 5.
Solve the equation for y. To do this, we'll rearrange the equation:
x - 5 = y^2.
Take the square root of both sides (considering both positive and negative square roots):
±√(x - 5) = y.
Swap y and x again to express the inverse function:
f^(-1)(x) = ±√(x - 5).
at castleton university alex bought three mathematics textbook and four programming textbooks athe same school rick bought eight mathematic textbooks and a single programming textbook of alex spent 854.14 rick spend 1866.39 on textbooks what was the average cost of each book
Answers
Answer:
math = 227.98
programming = 42.55
Step-by-step explanation:
Answer:
math = 227.98
programming = 42.55
Step-by-step explanation:
We have
3m + 4p = 854.14 -eq(1)
8m + 1p = 1866.39 -eq(2)
rq(2) x 4: 32m + 4p = 7465.56 -eq(3)
eq(3)-eq(1):
32m + 4p = 7465.56
- ( 3m + 4p = 854.14)
--------------------------------
29m = 6611.42
--------------------------------
⇒ m = 6611.42/29
m = 227.98
sub in eq(1)
3(227.98) + 4p = 854.14
4p = 854.14 - 683.94
4p = 170.2
p = 170.2/4
p = 42.55
Pamela is buying a $242,000 home with a 30-year mortgage. She will make
an 8% down payment. Use the table below to find her monthly PMI payment.
Base-To-Loan %
95.01% to 97%
90.01% to 95%
85.01% to 90%
85% and Under
OA. $96.48
OB. $144.72
OC. $157.30
OD. $151.01
Fixed-Rate Loan
30 yrs. 15 yrs.
0.90% 0.79%
0.78% 0.26%
0.52% 0.23%
0.32% 0.19%
ARM 2% +1 Year Cap
30 yrs.
15 yrs.
n/a
0.92% 0.81%
0.65%
n/a
0.37%
0.54%
0.26%
Answers
Looking at the "Base-To-Loan %" table, we see that Pamela's LTV ratio falls within the range of "90.01% to 95%". To determine her monthly PMI payment, we refer to the "Fixed-Rate Loan" column for a 30-year term, which has a corresponding PMI rate of 0.78%.
To calculate the PMI payment:
PMI payment = (Loan amount * PMI rate) / 12
PMI payment = ($222,640 * 0.0078) / 12 = $144.72
Therefore, Pamela's monthly PMI payment would be $144.72 (Option B).
Base-To-Loan %
95.01% to 97%
90.01% to 95%
85.01% to 90%
85% and Under
In this case, Pamela falls into the "90.01% to 95%" range. Now, we need to find the corresponding PMI rate for a fixed-rate loan with a term of 30 years.
Fixed-Rate Loan
30 yrs.
0.90% 0.79%
0.78% 0.26%
0.52% 0.23%
0.32% 0.19%
According to the table, the PMI rate for Pamela's situation is 0.78%.
Next, we calculate the monthly PMI payment using the loan amount and the PMI rate. Since Pamela is buying a $242,000 home and making an 8% down payment, the loan amount would be 92% of $242,000:
Loan amount = 0.92 * $242,000 = $222,640
To calculate the monthly PMI payment, we multiply the loan amount by the PMI rate and divide it by 12 (months):
Monthly PMI payment = ($222,640 * 0.78%) / 12
Now, let's perform the calculation:
Monthly PMI payment = ($222,640 * 0.0078) / 12
= $1736.83 / 12
= $144.74
Therefore, Pamela's monthly PMI payment is approximately $144.74.
From the provided options, the closest value to the calculated monthly PMI payment is option OB: $144.72.
David sold mugs at a crafts show. On the first day, he sold 10 mugs but lost $ 5.40 on each mug. On the second day, he raised his price and sold 7 mugs with a profit of $ 5.00 on each mug. What was his total profit or loss? Write a profit as a positive number and a loss as a negative number.
Answers
Answer:
Davis has a loss of $19
i.e -19
Step-by-step explanation:
On day 1, David lost 5.4 * 10 = $54
On day 2, David gained 5 * 7 = $35
Overall, his loss is greater than the profit
Total loss is $54 - $35 = $19
Pls help
Which statement is true?
A. As x increases, the rate of change of f(x) exceeds the rate of change of g(x).
B. As x increases, the rate of change of g(x) exceeds the rate of change of f(x).
C. On every interval of x-values, the average rate of change of g(x) exceeds the average rate of change of f(x).
D. On every interval of x-values,
the average rate of change of f(x) exceeds the average rate of change of g(x).
Answers
The statement that is true is as x increases, the rate of change of g(x) exceeds the rate of change of f(x). Option B
How to determine the statementFirst, let us determine the derivatives Let's first of the functions f(x) and g(x) to compare their rates of change:
The functions are given as;
f(x) = 1/50(3)
g(x) = 1/5(x²)
Since the derivative of a constant is zero, f'(x) = 0.
g'(x) = 2/5x
Then, we can say that the rate of change of g(x) increases faster than the rate of change of f(x) as x increases.
The rate of change of g(x) (2/5x) will grow as x increases, while the rate of change of f(x) stays constant.
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Does anybody know the answer i need. It quick!!!!!
Answers
The area of the triangle in this problem is given as follows:
34 ft².
How to obtain the area of a triangle?The area of a rectangle of base b and height h is given by half the multiplication of dimensions, as follows:
A = 0.5bh.
The parameters for this problem are given as follows:
b = 10 ft, h = 6.8 ft.
Hence the area is given as follows:
A = 0.5 x 10 x 6.8
A = 34 ft².
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eight hundred twenty nine and six tenths as a decimal
Answers
Any other questions ask :)
Find measure of angle HFJ
Look at picture for reference
Answers
The measure of angle HFJ in the right triangle JFH is 43 degrees.
What is the measure of angle HFJ?In the right triangle FGJ, first, we determine the hypotenuse FJ.
Angle GFJ = 43 degrees
Opposite of angle GFJ = 6
Hypotenuse FJ = ?
Using the trigonometric ratio, we can find the hypotenuse FJ:
sine = opposite / hypotenuse
sin( 43 ) = 6 / FJ
FJ = 6 / sin( 43 )
FJ = 8.7977
Now, we can find angle HFJ,
Angle HFJ = ?
opposite = 6
Hypotenuse FJ = 8.7977
Using the trigonometric ratio:
sin ( HFJ ) = 6 / 8.7977
sin ( HFJ ) = 6 / 8.7977
HFJ = sin⁻¹( 6 / 8.7977 )
HFJ = 43°
Therefore, angle HFJ measure 43 degrees.
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Find the measure of the indicated arc
Answers
Answer:
80
Step-by-step explanation:
Find the circumference and area of a circle with a diameter of 8 feet. Use 3.14 to approximate the value of
as needed. Include units of measure with proper exponents when applicable.
Answers
Answer:25.12
Step-by-step explanation:
Use the second equation
C = 8(3.14) = 25.12
Answer:
Area = 50.24 feet²
Circumference = 25.12 feet
Step-by-step explanation:
If the circle's diameter is 8 feet, then the radius will be 4 feet.
A=4²(3.14)
=16(3.14)
=50.24
C=2π(4)
C=8π
C≅25.12
A normal distribution has a mean of 7 and a standard deviation of 2 . What percent of values are from 7 to 13?
Answers
First, we calculate the z-score for 7:
Z1 = (7 - 7) / 2 = 0
Next, we calculate the z-score for 13:
Z2 = (13 - 7) / 2 = 3
Looking up the values in the standard normal distribution table, we find that the area to the left of Z1 (0) is 0.5000, and the area to the left of Z2 (3) is 0.9987.
To find the percentage between 7 and 13, we subtract the area to the left of Z1 from the area to the left of Z2:
Percentage = 0.9987 - 0.5000 = 0.4987
Therefore, approximately 49.87% of the values fall between 7 and 13 in this normal distribution.
49.87 because I searched it up
"Valeria and her family play the board game Parrots and Pirates on game night. Players who land on a cannon space roll a 6-sided weighted penalty die to determine how many gold doubloons they will lose. To see how the die is weighted, Valeria rolls it 15 times and records the results. Based on the data, what is the probability of rolling a 6 with this die.
Answers
The probability of rolling a 6 with this die would be = 1/15.
How determine the outcome of the given event?To determine the possibility of the given event, the formula for probability should be used and it's given below as follows:
Probability= Possible outcome/sample space
where;
possible outcome= 1
sample space= 15
Probability = 1/15
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simplify 9 1/2 x 9 1/2 using radical form
answers to choose from are
3, 9, 81 or 6561
Answers
Answer:
[tex] \sqrt{9} \sqrt{9} = 9[/tex]
Yesterday, Janie walked 3
5
mile to a friend’s house, 1
4
mile to the store, and 3
8
mile to another friend’s house. Which is the best estimate of the distance Janie walked?
Answers
Answer:
be more clear of what u mean edit the question so we can tell what u mean and answer correctly
Step-by-step explanation:
no explanation
pls help !!!!!! geometry
Answers
1. Replacement value: $270,000; coverage 80%
Answers
The insurance policy would cover up to $216,000 for the item or property.
If the replacement value of an item or property is $270,000 and your insurance policy provides coverage for 80% of the replacement value, it means that your insurance policy will cover up to 80% of the $270,000 in the event of a covered loss.
To calculate the coverage amount, you would multiply the replacement value by the coverage percentage:
Coverage Amount = Replacement Value * Coverage Percentage
In this case:
Coverage Amount = $270,000 * 0.80
Coverage Amount = $216,000
Therefore, your insurance policy would cover up to $216,000 for the item or property in question. Any losses exceeding this coverage amount would not be covered by your insurance policy.
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15. AB2+ BC2 = AC²
O A.
OB.
O C.
OD.
2 BDC = LADB
LBCA
DCB
2 BAC = LBAD
2 DBC = LBAC
multipl
Rese
Answers
Answer:
Step-by-step explanation:
Question 1 of 35
Colleen is buying a $279,000 home with a 30-year mortgage at 4.5%. Because
she is not making a down payment, PMI in the amount of $134.25 per month
is required for the first 2 years of the loan. Based on this information, what is
the total cost of this loan?
OA. $475,415
OB. $512,136
OC. $508,914
OD.
$493,776
SUBMIT
Answers
Answer:
Step-by-step explanation:
add it then subtract the value
Solve for x
000 о
10
07
0 5
6x + 8
K
U
N
122°
L
M
194°
Answers
The numerical value of x in the minor arc KU of the circle is 7.
What is the numerical value of x?The inscribed angle theorem states that an angle x inscribed in a circle is half of the central angle 2x that subtends the same arc on the circle.
It is expressed as:
Internal angle = 1/2 × ( major arc + minor arc )
From the diagram:
Internal angle = 122 degrees
Major arc = 194 degrees
Minor arc = ( 6x + 8 )
Plug these values into the above formula and solve for x:
Internal angle = 1/2 × ( major arc + minor arc )
122 = 1/2 × ( 194 + ( 6x + 8 ) )
Multiply both sides by 2:
122 × 2 = 2 × 1/2 × ( 194 + ( 6x + 8 ) )
122 × 2 =( 194 + ( 6x + 8 ) )
244 = 194 + 8 + 6x
244 = 202 + 6x
6x = 244 - 202
6x = 42
x = 42/6
x = 7
Therefore, the value of x is 7.
Option B) 7 is the correct answer,
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Please answer ASAP I will brainlist
Answers
I can't really see the graph clearly but I think that the x-intercepts should be (-16/7, 0) and (32/7, 0).
Answer:
x-intercepts: -2, 4
Step-by-step explanation:
The given graph shows a parabola that opens downwards.
The y-intercept is the point at which the curve crosses the y-axis, so when x = 0. From inspection of the given graph, we can see that the parabola crosses the y-axis when y = 8. Therefore, the y-intercept is (0, 8).
The x-intercepts are the points at which the curve crosses the x-axis, so when y = 0. From inspection of the given graph, we can see that the parabola crosses the x-axis when x = -2 and x = 4. Therefore, the x-intercepts are (-2, 0) and (4, 0).
Suitable average for averaging the shoe sizes of children is
Select one:
a. Mean
b. Harmonic Mean
c. Geometric Mean
d. Percentile
e. Mode