Understanding Basic Statistics 6th Edition by Charles Henry Brase,Corrinne Pellillo Brase

تمرين 97

Distribution: Heights of Coeds Assuming that the heights of college women are normally distributed with mean 65 inches and standard deviation 2.5 inches (based on information from Statistical Abstract of the United States, 112 th Edition), answer the following questions. Hint: Use Problems 5 and 6 and Figure 7-3.
(a) What percentage of women are taller than 65 inches
(b) What percentage of women are shorter than 65 inches
(c) What percentage of women are between 62.5 inches and 67.5 inches
(d) What percentage of women are between 60 inches and 70 inches