Set of hypothesis for testing

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Reference no: EM1313687

A company wanted to know if attending a course on "how to be a successful salesperson" can increase the average sales of its employees. The company sent six of its salespersons to attend this course. The following table gives the one-week sales of these salespersons before and after they attended this course:

Before

12

18

25

9

14

16

After

18

24

24

14

19

20

Differences

 

 

 

 

 

 

First find the 6 differences (Before course sales - After course sales)

Before

12

18

25

9

14

16

After

18

24

24

14

19

20

Differences

-6

-6

1

-5

-5

-4

Where,

Differences = before course sales - After course sales

1. Find the mean of the 6 differences

2Find the standard deviation of the differences

3. To find out whether the course is effective in increasing sales, the appropriate set of hypothesis for testing is (Be careful which one you choose!)

a. H0: μ = 0, Ha: μ < 0

b. H0: μ = 0, Ha: μ ≠ 0

c. H0: μ = 0, Ha: μ > 0

4. The appropriate test to use is

a. TTest           b. 1-PropZtest             c. ZTest            d. Chi-square test

5. Write down the p-value of the test

6. Based on the p-value and α = 0.05, the null hypothesis (Ho) is

a. Rejected                  b. not rejected                        c. Not enough information to draw a conclusion

7. Based on the above analysis (p-value and α = 0.05), we conclude that the course is

a. effective   

b. not effective           

c. Not enough information to draw a conclusion

Reference no: EM1313687

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