Question
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
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 eight employees take course 1 and another eight take course 2. Each employee takes a test which is graded out of a possible 25. The safety test results are shown below. Assume that the scores are normally distributed. Do these data provide sufficient evidence at the 5% level of significance to infer that the marks from course 2 are higher than from course 1?
course 1
14
21
17
14
17
19
20
16
Course 2
20
18
22
15
23
21
19
15
What is the appropriate test to perform?
- Paired test.H0:D<0versusHa:D=0
- Paired test.H0:D=0versusHa:D<0
- Two-sample test.H0:1=2versusHa:12
- Paired test.H0:D=0versusHa:D0
- Two-sample test.H0:1=2versusHa:1>2
- Two-sample test.H0:1=2versusHa:1<2
- Paired test.H0:D=0versusHa:D>0
- Two-sample test.H0:1<2versusHa:1=2
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