Suppose that the waiting times for patients at a local hospital are normally distributed with known population standard deviation of 30 minutes. A random sample of 75 patients in the local hospital had a mea time of 90 minutes. Assume a 95% confidence interval for the population mean u. The margin of error of the 95% confidence interval is O a. 5.69 8.06

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.5: Comparing Sets Of Data
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Suppose that the waiting times for patients at a local hospital are normally distributed with known
population standard deviation of 30 minutes. A random sample of 75 patients in the local hospital had a mean
time of 90 minutes. Assume a 95% confidence interval for the population mean µ. The margin of error of the
95% confidence interval is
а.
5.69
O b. 8.06
С.
6.79
O d. 8.93
Transcribed Image Text:Suppose that the waiting times for patients at a local hospital are normally distributed with known population standard deviation of 30 minutes. A random sample of 75 patients in the local hospital had a mean time of 90 minutes. Assume a 95% confidence interval for the population mean µ. The margin of error of the 95% confidence interval is а. 5.69 O b. 8.06 С. 6.79 O d. 8.93
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