[EX02-071] A random sample of 10 of the 2005 Nextel Cup NASCAR drivers produced the following ages:

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[EX02-071] A random sample of 10 of the 2005 Nextel Cup NASCAR drivers produced the following ages: 33, 48, 41, 29, 40, 48, 44, 42, 49, 28.

a. Find the range.

b. Find the variance.

c. Find the standard deviation.

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