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A sample of 145 tobacco smokers who recently completed a new smoking-cessation program were asked to rate the effectiveness of the program on a scale

A sample of 145 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 3.4 and the

standard deviation was 4.9.

Construct a 95% confidence interval for the mean score.

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