Measures of Spread Box Plot

-graph used to convey information about center and variability

• stem and leaf plot

• dot plot

• histogram

• box plot

describes middle 50% of data

• lower quartile range

• mean absolute deviation

• interquartile range

• deviation from the mean

difference between the largest and smallest value of a data set

• mean

• median

• mode

• range

Which data set has the smallest data value?

• Data Set A

• Data Set B

Which distribution has a larger Interquartile Range?

Which club has the smaller spread?

• Cruisers

• Car Hops

The double box plot shows the number of minutes that patients had to wait in the waiting room in two different doctors’ offices. Which information supports the statement that Dr. Smith has greater variation in wait times?

• The interquartile range is the same for both populations.

• The range is larger for Dr. Newton than for Dr. Smith.

• The range is 35 and IQR is 15 for Dr. Smith, these are both larger than Dr. Smith's range and IQR.

• The range is the same for both populations.

What is the shape of the data for Lucy's Steakhouse?

• Symmetrical

• Skewed Left

• Skewed Right

Represent the set of data in a box plot.

10, 8, 9, 7, 10, 12, 14, 14, 10, 16

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Describe the shape of the distribution.

• The shape of the distribution is not symmetric. There are no outliers.

• The shape of the distribution is not symmetric. There is an outlier.

• The shape of the distribution is symmetric. There are no outliers.

• The shape of the distribution is symmetric. There is an outlier.