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Posted by on Wednesday, July 28, 2010 at 9:13pm.

a. Find the mean, median, and range for each of the two data sets.

b. Find the standard deviation using the rule of thumb for each of the data sets.


c. Compare the two sets and describe what you discover.

The following data sets shows the ages of the first seven presidents (President Washington through President Jackson) and the seven most recent presidents including President Obama. Age is given at time of inauguration.

First 7: 57 61 57 57 58 57 61

Second 7: 61 52 69 64 46 54 47

  • Statistics - , Wednesday, July 28, 2010 at 9:16pm

    What is it you don't understand about these problems? We'll be glad to help you if we know what you don't understand.

  • Statistics - , Wednesday, July 28, 2010 at 9:26pm

    C is the one that is getting me

  • Statistics - , Wednesday, July 28, 2010 at 9:27pm

    What am I looking for when I compare the 2 sets. I have the answers for A and B.

  • Statistics - , Wednesday, July 28, 2010 at 9:34pm

    I haven't done the math -- but just eyeballing these numbers, it seems that the range is greater in the more recent presidents and that probably the mean age is younger.

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