Statistics Review

33, 25, 42, 25, 31, 37, 46, 29, 38
What is the interquartile range of the data?

• 8
• 9
• 13
• 21

Describe the shape of the graph.

• Skewed right
• Skewed left
• Uniform
• Symmetrical

Which graph has a correlation coefficient (r) of about -0.6 ?

• a
• b
• c
• d

A perfect positive correlation has a correlation coefficient of ____. 

• 1
• -1
• 0

• 617.51 miles

• 621.09 miles

• 100 miles

• 0.19 miles

During what time interval is the median? 

• 7:00-7:59 P.M.
• 8:00–8:59 P.M.
• 9:00–9:59 P.M.
• 10:00–10:59 P.M. 

Which of the following is true about the median and the mean of this dot plot?

• The median > mean

• The median < mean

• median = mean

• Can't tell with this type of graph

What percentage of girls have blonde hair?

• 30%
• 32%
• 29%
• 40%

What is the relative frequency of having an MP3 Player and no cell phone?

• 0.13

• 0.19

• 0.57

• 0.59

If the number of memberships in January are removed, which statement is true?

• The mode is affected more than the medical

• The median is affected more than the mean

• The mode is affected more than the mean

• The mean is affected more than the median