Probability & Statistics: Chapter 3 Test Review

Question 1

What is the range of the following data (NOT IN ORDER)?

Accepted Answer

11

Question 2

For a set of data, the sample variance is s2 = 12.5. What is the sample standard deviation?

Accepted Answer

3.54

Question 3

According to the box-and-whisker plot, what is the median of the data?

Accepted Answer

7

Question 4

CJ scored in the 78th percentile on the SAT. What percent of the test-takers scored above her?

Accepted Answer

22%

Question 5

Data set A has a larger standard deviation than Data set B. This guarantees that...

Accepted Answer

Data set A has a larger spread.

Question 6

What is the median of the following data (NOT IN ORDER)?

Accepted Answer

8.5

Question 7

Find the student&#x27;s weighted average.

Accepted Answer

77.22 C

Question 8

For the data below (NOT IN ORDER), find the sample mean.

Accepted Answer

9.1

Question 9

A jellyfish is what percent water?

Accepted Answer

95

Question 10

For the data below (in order), compute Q1, Q2, and Q3.

Accepted Answer

Q1 = 13.5, Q2 = 17, Q3 = 19

Question 11

Nina scored in the 68th percentile on her last test. What quartile is she in?

Accepted Answer

Third

Question 12

What are the mode and the range of the data (NOT IN ORDER)?

Accepted Answer

Mode = 12; Range = 37

Question 13

Compute an 89% Chebyshev interval.

Accepted Answer

13.05 through 30.15

Question 14

At Hogwarts, who was the head of Ravenclaw house and charms teacher?

Accepted Answer

Professor Flitwick

Question 15

The final number has changed in the following data. What will happen to the median?

Accepted Answer

The median will not change.

Question 16

What are the medians for each class?

Accepted Answer

Class #1: 70; Class #2: 80

Question 17

Use "Method #2" to find the sample variance.

Accepted Answer

9.3

Question 18

For the graph pictured, what is the median?

Accepted Answer

10

Question 19

According to the box-and-whisker plot, what are the extreme values?

Accepted Answer

7 and 20

Question 20

What is the IQR for each class?

Accepted Answer

Class #1: 25; Class #2: 15

Question 21

Use "Method #1" to find the population standard deviation for the following data.

Accepted Answer

3.03

Question 22

Find the 5% trimmed mean. The 14 data values are in order.

Accepted Answer

4.92

Question 23

What is the mode for the following data (NOT IN ORDER)?

Accepted Answer

8

Question 24

Jiffy as in "In a jiffy" is a real unit of time, how long is it?

Accepted Answer

1/100 of a Second

Question 25

Did Stephen pass the test?

Accepted Answer

Maybe, but we would have to know the other scores.

Question 26

Use "Method #1" to find the sample variance for the following data.

Accepted Answer

28.3

Question 27

Which histogram best matches the box-and-whisker plot shown?

Accepted Answer

J

Question 28

Find the five-number summary. The data is in order.

Accepted Answer

2, 3, 6, 8, 10

Question 29

What is the method for computing a 75% Chebyshev interval?

Accepted Answer

Center = mean; Jump = 2 standard deviations

Question 30

Compute a 75% Chebyshev interval.

Accepted Answer

2.7 through 17.9

Probability & Statistics: Chapter 3 Test Review

Questions 30

Probability & Statistics: Chapter 3 Test Review

Questions 30