Unit 2 Review

A teacher decides to put a grading curve on a recent test, increasing each score by 15 points. Which of the following values will NOT change?

• Mean

• Mode

• Each data point's z-score

• Standard Deviation

Which distribution would you expect to be skewed right (positively skewed)?

• Ages of college freshmen

• Ages of residents in a retirement home

• Ages of TV news viewers

• Ages of people who listen to the Rolling Stones

A data set is skewed left. What is the most likely comparison between the mean and the median?

• The mean is lower than the median.

• The mean is higher than the median.

• The mean and the median are the same value.

• The mean and median are both higher than the mode.

What is the mean absolute deviation of the following data set? 4, 16, 18, 18, 22, 23, 25, 25, 29

• 5.33

• 6.86

• 7.28

• 20

What is the standard deviation of the following data set? 4, 16, 18, 18, 22, 23, 25, 25, 29

• 5.33

• 6.86

• 7.28

• 20

What is the interquartile range (IQR) of the following data set? 4, 16, 18, 18, 22, 23, 25, 25, 29

• 17

• 25

• 8

• 12

Are there any outliers in the following data set? If so, what are they? 4, 16, 18, 18, 22, 23, 25, 25, 29

• No, there are no outliers

• Yes, 4 is an outlier

• Yes, 29 is an outlier

• Yes, 4 and 29 are outliers

What value represents the 43rd percentile in this data set? 4, 16, 18, 18, 22, 23, 25, 25, 29

• 18

• 22

• 20

• 19.2

In what percentile is the value "23" in this data set? 4, 16, 18, 18, 22, 23, 25, 25, 29

• 60

• 70

• 50

• 80

You are throwing water balloons at your sibling. Your Mean Absolute Deviation is going down. Are you getting closer or further away from your target?

• Closer

• Further Away

• There is no change