Examine the following sample data.

32 48 25 135 53 37 5 39 213 165 109 40 1 146 39 25 21 66 64 57 197 60 112 10 155 134 301 304 107 82 35 81 60 95 401 308 180 3 200 59 LO8

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.