Comparing Populations

Find the mean of these numbers:
5,11,2,12,4,2

• 4.1
• 6
• 4.5
• 4

What value is the lower quartile (Q1)?

• 66
• 58
• 60
• 64

Use the box-and-whisker plots to determine if this statement is true. The interquartile range (IQR) of the men’s ages is greater than the interquartile range of the women’s ages.

• True

• False

Which box and whisker plot has the smaller median?

• Top plot

• Bottom plot

The double dot plots show the average wait times in minutes for two popular rides at an amusement park. Compare the measures of center and variation, which ride typically has a longer wait time?

• No inference can be made from the graph.

• Topsy Turvy

• The wait times are the same for both rides.

• Rocket Blast

If both sets of data are symmetric, the most appropriate measure of center and variation to use are...

• median & interquartile range

• mean & interquartile range

• median & mean absolute deviation

• mean & mean absolute deviation

How would you describe this distribution?

• Left skewed
• Uniform
• Right Skewed
• Symmetrical

If one or both sets of data are not symmetric, the most appropriate measure of center and variation to use are...

• median & interquartile range

• mean & interquartile range

• median & mean absolute deviation

• mean & mean absolute deviation

What is the median?

• 62
• 58
• 66
• 60

Choose the best description of the overall shape of the dot plot.

• Skewed

• Uniform

• Symmetrical