A 95% confidence interval for 1 2 using the sample results x 1 =

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A 95% confidence interval for μ1 − μ2 using the sample results x̅1 = 75.2, s1 = 10.7, n1 = 30 and x̅2 = 69.0, s2 = 8.3, n2 = 20


Use the t-distribution to find a confidence interval for a difference in means μ1 − μ2 given the relevant sample results. Give the best estimate for μ1 − μ2, the margin of error, and the confidence interval. Assume the results come from random samples from populations that are approximately normally distributed.

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Statistics Unlocking The Power Of Data

ISBN: 9780470601877

1st Edition

Authors: Robin H. Lock, Patti Frazer Lock, Kari Lock Morgan, Eric F. Lock, Dennis F. Lock

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