Question

A random sample of 22 students from a statistics class is drawn from the previous term. The observed data (individual course grade) is as follows Σx = 66 and Σ x^2 = 202.5:

3.0, 3.5, 2.5, 3.0, 3.0, 4.0, 3.0, 3.0, 2.5, 3.0, 3.0, 2.5, 2.5, 3.5, 2.0, 3.0, 3.0, 3.5, 2.5, 3.5, 3.0, 3.5

The average course grade from the last five years is 2.7. Is the average grade of the students in this class different from 2.7? The lowest level of significance to reject the null hypothesis is:

A: 0.004

B: 0.002

C: 0.006

D: 0.008

E: 0.010

Answer 1

Dear students, please like it.

Thanks.