Question

A political scientist is interested in the effectiveness of a political ad about a particular issue. The scientist randomly asks 14 individuals walking by to see the ad and then take a quiz on the issue. The general public that knows little to nothing about the issue, on average, scores 51 on the quiz. The individuals that saw the ad scored an average of 45.79 with a variance of 26.01. What can the political scientist conclude with an α of 0.05?

a) What is the appropriate test statistic?
---Select--- na z-test one-sample t-test independent-samples t-test related-samples t-test

b)
Population:
---Select--- general public the ad the particular issue individuals walking by the political ad
Sample:
---Select--- general public the ad the particular issue individuals walking by the political ad

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 or  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.

A.Individuals that watched the political ad scored significantly higher on the quiz than the general public.

B.Individuals that watched the political ad scored significantly lower on the quiz than the general public.   

C.Individuals that watched the political ad did not score significantly different on the quiz than the general public.

Answer 1