Measures of Center and Shapes of Distribution

To find the mean of a set of numbers, add up all the items and divide by...

• 2 (half)

• The minimum of the data set

• The maximum of the data set

• The number of items in the data set

The number of miles that Jenna cycled each week for a 7-week period is shown: 
36, 42, 28, 52, 48, 36, 31 
What is the median number of miles Jenna cycled?

• 24

• 36

• 39

• 52

In order to find the median, the data must be sorted from least to greatest first.

• True

• False

• both sets of data have the same median
• Ander's center is at 6
• Marcus's center is at 7
• Ander's spread is greater than Marcus's

• The shapes of both plots are symmetrical.

• The data spreads for both populations are the same.

• Route 9 is skewed left.

• Route 9 is skewed right.

• Both plots have outliers.

Which measure of center is more appropriate, the mean or the median? Why?

• Mean because this is a skewed data set.

• Median because this is a skewed data set

• Mean because this set is normally distributed.

• Median because this set is normally distributed.

The shape of the distributions is _______________________________________.

• Skewed left

• Skewed right

Select all the true statements about this data set:

2, 57, 38, 42, 6

• The mean is 29.

• The range is 55.

• There is no mode.

• The median is 38.

What is the shape of the distribution?

• Skewed Left

• Skewed Right

• Symmetric (normal)

How would you describe this distribution?

• Left skewed

• Symmetrical (normally distributed)

• Right Skewed