# Mean Median Mode, standard deviation and probability

Question 2

The table below includes data on the number of purchases made by a sample of 50 customers.

5 6 7 8 9

5 6 7 8 9

5 6 7 8 9

5 6 7 8 9

5 6 7 8 9

5 6 7 8 9

5 6 7 8 9

5 6 7 8

5 7

5 7

5 7

5 7

7

7

7

a) Find the mean, mode, median, and standard deviation for this sample. Be sure to list the appropriate formulas to support your work.

b) Now assume that this data represents the entire population. Find the population mean and the population standard deviation.

c) Find the probability that X will be greater than 6.

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#### Solution Preview

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The table below includes data on the number of purchases made by a sample of 50 customers.

5 6 7 8 9

5 6 7 8 9

5 6 7 8 9

5 6 7 8 9

5 6 7 8 9

5 6 7 8 9

5 6 7 8 9

5 6 7 8

5 7

5 7

5 7

5 7

7

7

7

a) Find ...

#### Solution Summary

The solution solves for the mean, median, mode and standard deviation for the sample.