Based on a sample of 32 randomly selected years,a 90% confidence interval for the mean annual precipitation in one city is from 119.1 cm to 125.9 cm

Name: Based on a sample of 32 randomly selected years,a 90% confidence interval for the mean annual precipitation in one city is from 119.1 cm to 125.9 cm
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Question

Quizplus · Accepted Answer

Since the confidence interval is given as (119.1, 125.9), we know that the margin of error is half the width of the interval, which is (125.9 - 119.1) / 2 = 3.4. Therefore, the best choice is C) 3.4 cm.

Based on a Sample of 32 Randomly Selected Years,a 90