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A Sample of 125 Tobacco Smokers Who Recently Completed a New

Question 54
Multiple Choice
arrowQuestion 54arrow
Multiple Choice

A sample of 125 tobacco smokers who recently completed a new smoking-cessation program were asked to rate the effectiveness of the program on a scale of 1 to 10, with
10 corresponding to "completely effective" and 1 corresponding to "completely
Ineffective". The average rating was 4.1 and the standard deviation was 4.0.
Construct a 95% confidence interval for the mean score.

A) 3.8<μ<4.43.8 < \mu < 4.4
B) 0<μ<4.10 < \mu < 4.1
C) 3.4<μ<4.83.4 < \mu < 4.8
D) 3.7<μ<4.53.7 < \mu < 4.5

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