One-Variable Statistics

What type of graph is this?

• Bar graph

• Five-point summary

• Histogram

• Parabola

What is the interquartile range of this data?

• 8 books

• 5.5 books

• 3.5 books

• 9 books

What is the best measure of variability for this data, so that it will not be affected by outliers?

• IQR

• Standard Deviation

• Range

• Median

What is the best measure of central tendency for this data, so that it will not be affected by outliers?

• Median

• Mean

• Mode

• Standard Deviation

Calculate the standard deviation of the following set of numbers: 4, 8, 8, 10, 12.

• 2.83

• 3

• 3.16

• 4

Find the coefficient of variation for a data set with a mean of 20 and a standard deviation of 5.

• 25%

• 20%

• 15%

• 10%

The mean of a dataset is 20, and the standard deviation is 4. What is the z-score of a data point that is 24?

• 1

• 10

• 0

• 4

Is this a probability distribution?

• No

• Yes

What is the range of this data?

• 8 books

• 6 books

• 10 books

• 9 books

The middle half of the data for Red brick Grill has less variability than the middle half of the data from Sophie's cafe.

• True

• False. The middle half of the data for Red brick Grill has Greater variability than the middle half of the data from Sophie's cafe.

• False. The middle half of the data for Red brick Grill has the same variability as the middle half of the data from Sophie's cafe.

• This can not be determined from the box plots provided.