Below is an observed frequency distribution. Using a normal distribution with

? (mu)=5 and ?(sigma)= 1.5,

(a) Find the probability of falling in each class.

(b) From part (a), compute the expected frequency of each category.

(c) Calculate the chi-square statistic.

(d) At the 0.10 level of significance, does this frequency distribution seem to be

well described by the suggested normal distribution?

\f