5. A company claims that a vitamin supplement decreases the recovery time from a common cold. A researcher selected randomly 70 adults with a cold. 35 of those were randomly selected to receive the vitamin. The data on the recovery time are shown below. Test the claim of the company at a = 0.05. Population No vitamin vitamin Sample size 35 35 Sample mean 6.9 5.8 Sample standard deviation 2.9 1.2

5. A company claims that a vitamin supplement decreases the recovery time from a common cold. A researcher selected randomly 70 adults with a cold. 35 of those were randomly selected to receive the vitamin. The data on the recovery time are shown below. Test the claim of the company at a = 0.05. Population No vitamin vitamin Sample size 35 35 Sample mean 6.9 5.8 Sample standard deviation 2.9 1.2

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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