Does posting calorie content for menu items affect people's choices in fast food restaurants? According to results
Question:
Although most of the adolescents reported noticing the calorie labels, apparently the labels had no effect on their choices. Data similar to the results obtained show an average of M = 786 calories per meal with
s = 85 for n = 100 children and adolescents before the labeling, compared to an average of M = 772 calories with σ = 91 for a similar sample of n = 100 after the mandatory posting.
a. Use a two-tailed test with a = .05 to determine whether the mean number of calories after the posting is significantly different than before calorie content was posted.
b. Calculate r2 to measure effect size for the mean difference.
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Related Book For
Essentials Of Statistics For The Behavioral Sciences
ISBN: 9781133956570
8th Edition
Authors: Frederick J Gravetter, Larry B. Wallnau
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