Measures of Center and Variance

If a data set is bimodal, how many modes does it have?

• 1

• 2

• 3

• 4

A  number that is either MUCH larger or MUCH smaller than the rest of the numbers is a(n)

• outlier

• inlier

• lier

• I'm lying

The __________ of a set of data is the average distance between each data value and the mean.

• mean absolute deviation

• measures of center

• range

• outliers

Find the mode:
5, 0, 9, 9, 3, 0, 5, 5, 4

• 9

• 5

• 3

• 7

Find the median:
5, 6, 3, 9, 0, 4, 1, 2, 7

• 4

• 4.1

• 5

• 4.5

When finding the median, what do you do if there are two middle numbers?

• Add them together and divide by 2

• Write them both as the answer

• Give up

• Pick one

Median is the

• data

• average

• most frequent

• middle of the numbers

Mode is the

• most frequent

• middle of the numbers

• data

• average

Find the median, first quartile, third quartile, and interquartile range of the data.

• Median: 54

  First Quartile: 49

  Third Quartile: 67

  IQR: 18

• Median: 54

  First Quartile: 48

  Third Quartile: 69

  IQR: 21

• Median: 54

  First Quartile: 48

  Third Quartile: 69

  IQR: 22

• Median: 54

  First Quartile: 49

  Third Quartile: 69

  IQR: 20

The second quartile is the same as the __________________ .

• mean

• mode

• range

• median