Chapter 7.3, Problem 4P

Critical Thinking: Normality Consider the following data. The summary statistics histogram, and normal quantile plot were generated using Minitab.

27	27	27	28	28	28	28	28	28	29	29	29	29	29	29
29	29	29	29	30	30	30	30	30	30	30	30	30	30	30
30	31	31	31	31	31	31	31	31	32	32	32	32	33	33
33	33	33	34	34

(a) Does the histogram indicate normality for the data distribution? Explain

(b) Does the normal quantile plot indicate normality for the data distribution?

Explain.

(c) Compute the interquartile range and check for outliers.

(d) Compute Pearson's index. Does the index value indicate skewness?

(e) Using parts (a) through (dl. would you say the data are from a normal distribution?