A consumer testing organization is comparing the battery life of two different models of smart phones. They

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A consumer testing organization is comparing the battery life of two different models of smart phones. They randomly sample 49 of each model of smart phone (independent samples). The 49 phones in group 1 have an average battery life of 11 hours with a sample standard deviation of 0.7 hours. The 49 phones in group 2 have an average battery life of 9 hours with a sample standard deviation of 1.4 hours The standard error for the difference in the two averages is

Posted Date: May 17, 2024 11:03 AM

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A consumer testing organization is comparing the battery life of two different models of smart phones. They

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