59 Examine the following sample data saved in the LM5_59 file.

a. Construct a stem-and-leaf plot to assess whether the data are from an approximately normal distribution.

b. Find the values of QL, QU, and s for the sample data.

c. Use the results from part b to assess the normality of the data.

d. Generate a normal probability plot for the data, and use it to assess whether the data are approximately normal.

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