A fast-food chain advertises that the mediumsize serving of French fries weighs 135 grams. A reporter took
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A fast-food chain advertises that the mediumsize serving of French fries weighs 135 grams. A reporter took a random sample of 10 medium orders of French fries and weighed each order. The weights (in grams) were 111, 124, 125, 156, 127, 134, 135, 136, 139, 141. Assume the population distribution is Normal.
a. Test the hypothesis that the medium servings have a population mean different from 135 grams. Use a significance level of 0.05.
b. Construct a 95% confidence interval for the population mean. How does your confidence interval support your conclusion in part a? Do you think the consumers are being misled about the serving size? Explain.
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Related Book For
Introductory Statistics Exploring The World Through Data
ISBN: 9780135163146
3rd Edition
Authors: Robert Gould, Rebecca Wong, Colleen N. Ryan
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