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A school psychologist wishes to determine whether a new anti-smoking film actually reduces the daily consumption...

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Statistics

A school psychologist wishes to determine whether a newanti-smoking film actually reduces the daily consumption ofcigarettes by teenage smokers. The mean daily cigarette consumptionis calculated for each of eight teenage smokers during the monthbefore and the month after the film presentation, with thefollowing results: MEAN DAILY CIGARETTE CONSUMPTION

SMOKER NUMBER BEFORE FILM (X1) AFTER FILM (X2)

1 28 26

2 29 27

3 31 32

4 44 44

5 35 35

6 20 16

7 50 47

8 25 23

A) Is there a significant difference in the number ofcigarettes smoked before the film as compared to the number ofcigarettes smoked after the film?

B) What does this NOT necessarily mean?

C) What might be done to improve the design of thisexperiment?

Answer & Explanation Solved by verified expert
3.7 Ratings (562 Votes)
Ho There is no difference in no of cigarettes smoked beforeand after watching the filmH1 There is difference in    See Answer
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