Ariella Ariella
  • 07-04-2025
  • Mathematics
College

A survey of 30 emergency room patients shows the average waiting time for treatment to be 174.3 minutes. Assume the waiting times for treatment are normally distributed with a population standard deviation of 46.5 minutes. Construct a 99% confidence interval for the population mean waiting time for treatment.

What is the sample mean?

A. 31.8
B. 30
C. 174.3
D. 46.5

Answer :

hmkessler09 hmkessler09
  • 17-01-2025
174.3 should be the answer!
Answer Link

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