Stats Review

What is the mean of the following set of numbers: 4, 8, 15, 16, 23, 42?

• 18

• 16

• 20

• 22

If the median of a set of numbers is 24, and you add a number greater than 24 to the set, what happens to the median?

• It decreases.

• It stays the same.

• It increases.

• It cannot be determined without more information.

What is the mode of the following set of numbers: 7, 12, 12, 19, 21, 21, 21, 29?

• 12

• 21

• 19

• There is no mode.

Calculate the Mean Absolute Deviation (MAD) of the following data set: 3, 7, 7, 15.

• 4

• 4.5

• 5

• 5.5

Which of the following is true about box plots?

• They show the mean and standard deviation of a data set.

• They are used to display the distribution of a data set.

• They cannot show outliers.

• They only display the median of a data set.

In a dot plot, what does each dot represent?

• A category

• A percentage

• An individual data point

• The mean of the data set

What does the Interquartile Range (IQR) measure in a data set?

• The range of the middle 50% of the data

• The average deviation from the mean

• The difference between the mean and median

• The total spread of the data

How is standard deviation used in analyzing a data set?

• To determine the median of the data

• To find the mode of the data

• To measure the spread of the data around the mean

• To calculate the mean absolute deviation

What is the median of the following set of numbers: 3, 9, 14, 17, 24?

• 9

• 14

• 17

• 24

If a data set has a low standard deviation, what does this indicate about the data?

• The data points are spread out over a wide range.

• The data points are closely clustered around the mean.

• The data set contains many outliers.

• The mean of the data set is very high.