Boxplots and Outliers

Question 1

A box of LED light bulbs was tested to see how long the light bulbs last. The standard deviation of the light bulb lifetime data was five years. Which of the following is the best interpretation of this value?

Revolt · Accepted Answer

C: The lifetime of the light bulbs typically varies by about five years from the mean.

Question 2

Some teenagers collected trash for a beach clean-up. The data for the number of pounds of trash collected by each teenager are shown below.26, 26, 21, 22, 20, 25, 35

Revolt · Accepted Answer

B: 5 pounds

Question 3

As an introduction to probability, a student is asked to roll a fair, six-sided number cube seven times. The results of those seven rolls are shown below.1, 4, 4, 4, 4, 6, 5

Revolt · Accepted Answer

B: 1.53

Question 4

A statistics student gave a survey to students which asked how many first cousins they have. The data from the first nine responses are shown below.6, 2, 7, 8, 8, 8, 5, 10, 10

Revolt · Accepted Answer

C: 3.5 first cousins

Question 5

Without making any calculations, which distribution of data has the smallest standard deviation?

Revolt · Accepted Answer

D: 1, 1, 1, 1, 1, 1

Question 6

Shoppers were surveyed about their spending for holiday shopping. The standard deviation of the amount shoppers spent was $125. Which of the following is the best interpretation of this value?

Revolt · Accepted Answer

C: The amount shoppers spent typically varies by about $125 from the mean.

Question 7

Which of the following statements is true about the IQR, range, and standard deviation?

Revolt · Accepted Answer

B: The IQR is the most resistant to extreme values.

Question 8

A statistics student gave a survey to students which asked how many first cousins they have. The data from the first nine responses are shown below.6, 2, 7, 8, 8, 8, 5, 10, 10

Revolt · Accepted Answer

D: 8 first cousins

Question 9

The parallel dotplots below display the number of hours spent studying for a final exam by each of two classes.

Revolt · Accepted Answer

C: There is a larger standard deviation in the distribution of the number of hours spent studying for calculus.

Question 10

The parallel dotplots below display the girths (belly circumference) of some male and female pigs.

Revolt · Accepted Answer

D: The standard deviation for the distribution of girths is about the same for both male and female pigs.

Boxplots and Outliers Answers

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