Posted by **Christy** on Friday, July 16, 2010 at 4:28pm.

1. For the following exercise, complete the following:

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

I need help on part C of the question. When it is asking me to compare the two data sets does it want me to calculate something? I am lost on this part.

- Statistics -
**PsyDAG**, Saturday, July 17, 2010 at 10:57am
What type of distribution is each set of scores? Skewed? Bimodal? Normal? How do the measures of central tendency compare? How about variability?

Does that help?

- pre-algebra -
**Luisdavid**, Tuesday, September 28, 2010 at 1:16am
Use statistics to explain how the times for 6 grades compare to the timesfor 8 grades

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