Author Question: At one college, GPA's have a bell-shaped distribution with a mean of 2.9 and a standard deviation of ... (Read 66 times)

joesmith1212 · **on:** Aug 1, 2018

At one college, GPA's have a bell-shaped distribution with a mean of 2.9 and a standard deviation of 0.4. What percentage of students at the college have a GPA between 2.5 and 3.3?

A) 99.7 B) 95 C) 68

Question 2

If H0 is true in a chi-square test of independence, then the expected and observed .

a. means in a cell of a contingency table should be about equal
b. standard deviations in a cell of a contingency table should be about equal
c. frequencies in a cell of a contingency table should be unequal
d. frequencies in a cell of a contingency table should be about equal