Measures of Variability and Central Tendency

What measure of central tendency (mean, median or mode) would be best for the following set of data?
0, 89, 92, 97, 99, 100

• Mode, because it is the one that shows up the most.

• Median, because there is an outlier.  The outlier could be incorrect and would influence the mean too much.

• Mean, because there is not an outlier.  You should always use the mean.

• There is not a best measure of central tendency for this data.

What is the range of the set of data?

• 70

• 65

• 80

• 55

What effect will the outlier have on the median of the data if the outlier is excluded?

4, 6, 3, 4, 3, 6, 24

• insufficient information to conclude

• increases

• decrease

• does not change

Which dot plot shows more variability? a or b?

• a

• b

What is the median of this dot plot?

• 5

• 33

• 32.5

• 35

What is the MODE of this dot plot?

• 33

• 5

• 35

• 32

What is the RANGE of this dot plot?

• 35

• 30

• 5

• 33

Which measure of central tendency best represents this set of data:
3, 18, 2, 0, 1, 0, 2, 1

• Mean

• Median

• Mode

• Range

Which measure of central tendency best represents this set of data:
3, 4, 5, 4, 5

• Mean

• Median

• Mode

• Range

What is the MEDIAN of this data

• 95

• 90

• 100

• 40