Unit 2 Quiz Practice

A boxplot is shown with a minimum value of 2, a first quartile (Q1) of 7, a median of 11, a third quartile (Q3) of 17, and a maximum value of 26. What is the interquartile range (IQR) of the data?

• 8

• 10

• 12

• 14

Given the data set: 4, 8, 10, 12, 14, 18, 20, what is the mean of the data?

• 12

• 13

• 14

• 15

For the same data set: 4, 8, 10, 12, 14, 18, 20, what is the median?

• 10

• 12

• 14

• 16

Which of the following best describes a distribution that is skewed to the right?

• The mean is less than the median.

• The mean is greater than the median.

• The mean is equal to the median.

• The distribution is symmetric.

If a data set has a standard deviation of 0, what can be said about the data?

• All data points are different.

• All data points are the same.

• The data is skewed.

• The data is normally distributed.

A histogram is shown with a peak at the right and a long tail to the left. What is the shape of this distribution?

• Skewed left

• Skewed right

• Symmetric

• Bimodal

Which measure of center is most affected by outliers?

• Mean

• Median

• Mode

• Range

Calculate the range of the following data set: 8, 12, 16, 22, 28.

• 14

• 16

• 18

• 20

What is the standard deviation of a data set if the variance is 36?

• 4

• 5

• 6

• 7

In a boxplot, what does the line inside the box represent?

• Mean

• Median

• Mode

• Range