Question

A cigarette company rand an advertising campaign designed to improve sales. To evaluate their campaign, they...

A cigarette company rand an advertising campaign designed to improve sales. To evaluate their campaign, they had subjects record the average number of cigarettes smoked per day in the week before and the week after exposure to the ad. What can be concluded with an α of 0.05. The data are below.

before after
46
25
21
34
31
20
34
26
27
41
35
17
12
29
18
19
27
26
16
41

a) What is the appropriate test statistic?
---Select--- na z-test One-Sample t-test Independent-Samples t-test Related-Samples t-test

b)
Condition 1:
---Select--- before advertising campaign smoking cigarettes after
Condition 2:
---Select--- before advertising campaign smoking cigarettes after

c) Compute the appropriate test statistic(s) to make a decision about H0.
(Hint: Make sure to write down the null and alternative hypotheses to help solve the problem.)
critical value =  ; test statistic =
Decision:  ---Select--- Reject H0 Fail to reject H0

d) If appropriate, compute the CI. If not appropriate, input "na" for both spaces below.
[  ,  ]

e) Compute the corresponding effect size(s) and indicate magnitude(s).
If not appropriate, input and/or select "na" below.
d =  ;   ---Select--- na trivial effect small effect medium effect large effect
r2 =  ;   ---Select--- na trivial effect small effect medium effect large effect

f) Make an interpretation based on the results.

There was a significant decrease in cigarettes smoked after the ad.There was a significant increase in cigarettes smoked after the ad.    There was no significant difference between the number of cigarettes smoked before and after the ad.

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