Question
In a sample of 121 hip surgeries of a certain type, the average surgery time was 136.5 minutes, with a standard deviation of 22.4 minutes.
In a sample of 121 hip surgeries of a certain type, the average surgery time was 136.5 minutes, with a standard deviation of 22.4 minutes. Construct a 90% confidence interval for the mean surgery time for this procedure round the answers to one decimal place.
A 90% confidence interval for the mean surgery time for this procedure is?
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Algebra And Trigonometry (Subscription)
Authors: Michael Sullivan
9th Edition
0321830741, 9780321830746
