Describing Measures of Center and Variability

The data set below has an outlier of 42.
2, 5, 12, 15, 19, 4, 6, 11, 16, 18, 12, 12, 42
What effect does removing the outlier have on the distribution of the data?

• The mean will decrease

• The median will decrease

• The mean will increase

• The median will increase

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

Which measure of center best represents this set of data?
12, 13, 11, 16, 31, 14, 10, 15

• Mean

• median

• mode

What measure of center is best to use when we have outliers?

• mean

• median

• mode

• range

What is the maximum value?

• 58

• 66

• 64

• 60

What is the interquartile range (IQR)?

• 4

• 64

• 60

• 8

The Table above shows the points scored by the JV basketball team in their first seven games. Calculate the mean, median, mode and range. Which statistical measure makes the team sound the best?

• Mean

• Median

• Mode

• Range

What is the Mode?
  22,7,22,1,7,18,18,16,6,6,7

• 7

• 18

• 21

• 6

The interquartile range (IQR) of a data set is the difference between the third and first quartiles. It represents the range of the middle half of the data.

• True

• False