Dr. Christina Cuttleman, a nutritionist, claims that the average number of calories in a serving of popcorn
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Question:
Dr. Christina Cuttleman, a nutritionist, claims that the average number of calories in a serving of popcorn is 75 with a standard deviation of 7. A sample of 50 servings of popcorn was found to have an average of 78 calories.
a. Should z test or t test be used?
b. Check Dr. Cuttleman's claim at a = 0.05.
Related Book For
Elementary Statistics A step by step approach
ISBN: 978-0073386102
8th edition
Authors: Allan Bluman
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