Comparing Data Sets and Distributions

Given a set of skewed data, which is an appropriate measure of spread?

• Mean

• Median

• Standard Deviation

• Interquartile Range (IQR)

Gabriella’s quiz grades are shown below.
88, 92, 92, 96, 98
Gabriella scored a 20 on her sixth quiz. What effect does this score have?

• The low score causes the median to increase.

• The low score causes the median to decrease.

• The low score causes the mean to increase.

• The low score causes the mean to decrease.

Given a set of skewed data, which is an appropriate measure of center?

• Mean

• Median

• Mode

Which data set has the higher median value?

• Data Set A

• Data Set B

Which data set has the smaller IQR?

• Data Set A

• Data Set B

The box-and-whisker plot shown represents some data set.

What percentage of the data values are less than or equal to 34?

• 25%

• 50%

• 75%

• 100%

The box-and-whisker plot shown represents some data set.

What percentage of the data values are greater than or equal to 80?

• 25%

• 50%

• 75%

• 100%

Which data set has the smallest data value?

• Data Set A

• Data Set B

Band members are selling magazines to raise $200 for a school dance.  The bar graph shows the amount of the sales so far.  Which statement is best supported by the information in the graph? 

•   Stan does not like selling magazines as much as the other band members. 

• Josh raised half as much money as Chris

•   Altogether they have raised more than $150. 

• Mya has raised $5 more than Stan. 

Which city, Nashville or Dallas, has the lowest Q1?

• Nashville

• Dallas