1. Consider the following table of the ages of our first six presidents

Ages of the first 6 presidents at inauguration

Washington   57

J. Adams         61

Jefferson        57

Madison         57

Monroe          58

JQ Adams        57

a. Find the mean of the data set

b. Find the standard deviation (showing all work)

c. How many of the presidents ages fall within one standard deviation of the mean?

2. Consider the following table of the ages of our last six presidents

Ages of the last 6 presidents at inauguration

Carter             52

Reagan           69

G. Bush           64

Clinton            46

GW Bush        54

Obama            47

a. Find the mean of the data set

b. Find the standard deviation (showing all work)

c. How many of the presidents ages fall within one standard deviation of the mean?

3. Consider the standard deviations you found in parts (1) and (2). Which standard deviation indicates more variation in the data set? Justify your answer

MAT 142 4.3 Measures of Dispersion .

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