What happens to the mean of the data set
{2, 4, 5, 6, 8, 2, 5, 6} if the number 7 is added to the data set?

A. The mean decreases by 1.
B. The mean increases by 2.
C. The mean increases by 0.25.
D. The mean increases by 0.75

2+4+5+6+8+2+5+6= 38/8 = 4.75

2+4+5+6+8+2+5+6+7 = 45/9 = 5

5 - 4.75= 0.25

C. The mean increased by 0.25

In the given situation, The mean increased by 0.25

A mean in maths is the average of a data set, found by adding all numbers together and then dividing the sum of the numbers by the number of numbers.

Given is a data set, {2, 4, 5, 6, 8, 2, 5, 6}, it is asking, what happens to the mean of the data set if the number 7 is added to the data set?

Mean before:

2+4+5+6+8+2+5+6 = 38/8 = 4.75

Mean after:

2+4+5+6+8+2+5+6+7 = 45/9 = 5

The result:

5 - 4.75 = 0.25

Hence, The mean increased by 0.25

For more references on mean, click;

https://brainly.com/question/521501

#SPJ2

Kristen wants to ask the managers of the fast food restaurants in a large city "How do you retain employees?" What condition must be true to justify surveying only a sample of the managers instead of surveying the entire population of managers?

The population is small.

The population is diverse.

The population is not the target of the survey question.

The population is expensive and time-consuming to survey.​

Pete is standing 4 feet away from a mirror on the ground. Pete is 6 feet tall and can just see the top of the tree in the mirror from where he is standing. The two triangles formed in the picture above are similar.

If the mirror is 16 feet away from the base of the tree, how tall is the tree?

a. 18 ft
b. 10 ft
c. 24 ft
d. 15 ft

PPPFT PLZ HELP ME I NEED HELP NO ONE WANTS TO HELP MNE ON THIS PLZ HELP

please answer! giving branliest. provide me with answers, or answer sheet, thanks!

need helllllllllllpppppppppppppppp

The chalk circle around the pitcher's mound has a diameter of 16 ft. What is the area of the pitcher's circle?

find the value of x
no links or i'll hit you with the chancla .

What is the IQR for the following data?

SOMEBODY HELP ME ILL GIVE BRAINLIEST, NO LINKS!

plsplsplsplspsplsplsplsplsplsplspslpslpls

can you help meeee pls i dont understand this thanx

Please answer all of them and please look at the screenshots, I really need help.

I need help can you please help me for 10 points please
and brainliest

1. In a comparison taste test of two juice drinks, 780 people preferred

Cranberry Blast. Only 220 people preferred Melon Splash. Complete

each statement.

a. There were more people who preferred Cranberry Blast.

b. In the taste test, () of the people preferred Cranberry Blast.

c. People who preferred Cranberry Blast outnumbered those who

preferred Melon Splash by a ratio of () to ().


Students at a middle school are asked to record how they spend their

time from midnight on Friday to midnight on Sunday. Carlos records

his data on his phone. Use his phone sereen for Exercises 4-7.


Decide whether each statement is an accurate description of how

Carlos spent his time that weekend. Explain your reasoning. Please refer to the smartphone image. ()

————

Carlos spent one-sixth of his time watching television. ()

————

The ratio of hours spent watching television to hours spent doing

chores or homework was 3 to 1. ()

————

Sports, Internet, and watching television took about 33% of

his time. ()

————

Time spent doing homework was only 20% of the time spent

watching television. ()

————

Sleeping, eating, and "other" activities took up 12 hours more

than all other activities combined. ()

————

A class at Middlebury Middle School collected data on the types of

movies students prefer. Complete each statement using the table.

Types of Movies Preferred by Middlebury Students

Action- 75,90

Comedy-105,150

Total-180,240


The ratio of seventh-graders who prefer comedies to

eighth-graders who prefer comedies is () to ().


b. The fraction of total students (both seventh-and eighth-graders)

who prefer action movies is ().

C. The fraction of seventh-graders who prefer action movies is ()


The sketches betow show two members of the Grump family. The

Crumps are geometrically similar. Use the figures in exercises 33- 36.

Grump A- 0.8 in.

Grump B-1.2 in.

33. Write statements comparing the lengths of corresponding segments

in the Grumps. Use each concept at least once.

a. ratio

b. fraction

c. scale factor



Suppose a news story reports "A survey found that

of all Americans watched the Super Bowl on television." Bishnu thinks this means the survey reached seven people and four of them watched the Super Bowl on television. Do you agree with him? If not, what does the
Statement mean? ()

Which measure of center would you use to describe a data set with no extreme values and no big gaps?

can someone help plz

Combine like terms: 4-4z+5z-2+2z then solve

Lin has a small baking pans shaped like a rectangular prism.

Lin’s pan has a length of 2 2/3 inches, a width of 3 3/4 inches, and a height of 1 1/2 inches.

What is the volume of this pan?



[ type number AND unit]

Noah bought stock in a company two years ago that was worth x dollars. During the first year that he owned the stock, it increased by 31%. During the second year the value of the stock increased by 15%. Write an expression in terms of x that represents the value of the stock after the two years have passed.

123333333333333333333

What is the value of X?

Mr. boyd spent too much time on his speech and was late for the prom. He needs to be at the prom at 17:15 to help with the preparations. If he lives 20 km away and he leaves home at 16:40, what speed should he drive to get there on time. Allow him to park for 10 minutes and walk. Round your answer to the nearest kilometers per hour.

pls help with the IQR

A tree initially measured 27 1/2 feet tall. Over the next 3 1/2 years, it grew to a final height of 35 1/2 feet. During those 3 1/2 years, what was average yearly growth rate of the height of the tree

A.) 2 1/7 feet/year
B.) 2 2/7 feet/year
C.) 2 4/7 feet/year
D.) 2 6/7 feet/year

find rate of change AND initial value

i don't think this is too hard but help

what is the area of a semicircle with a diameter of 12?

PLS HELP: GCSE QUESTION!!!

(see image)

Help? : to answer this question click the answer and you will see the image

Please help and look at the screenshots i really need help