N Because of the rising costs of industrial accidents many chemical, mining, and manufacturing firms have instituted safety courses,
Employees are encouraged to take these courses designed to heighten safety awareness. A company is trying to decide which one of two
courses to institute. To help make a decision, seven employees take course 1 and another six take course 2. Each employee writes a test,
which is marked, out of a possible 25. The results are shown below.
Sample Standard Deviation
Course 1
2.76
Course 2
6
2.93
We are interested in determining whether the variance in marks differs between the two courses. The p-value for the test is calculated to
be 0.873. At significance level a 0.10, which statement is correct?
7
Select one
O a. The p-value is greater than a=0.10 and they cannot conclude that there is a difference between the variances.
O b. The p-value is less than a 0.10 and they cannot conclude that there is a difference between the variances.
O c. The p-value is greater than a 0.10 and they should conclude that there is a difference between the variances
d. The p-value is less than a=0.10 and they should conclude that there is a difference between the variances.