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THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING INFORMATION

Question 31

Multiple Choice

THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING INFORMATION:
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.
-What is the formula used to calculate the standard error?


A) σ / THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING INFORMATION: 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. -What is the formula used to calculate the standard error? A) σ / B) σ<sup>2</sup> / C) σ / n D) σ / n<sup>2</sup>
B) σ2 / THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING INFORMATION: 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. -What is the formula used to calculate the standard error? A) σ / B) σ<sup>2</sup> / C) σ / n D) σ / n<sup>2</sup>
C) σ / n
D) σ / n2

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