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QUESTION 2 The amount of time a bank teller spends with each customer has a population mean of 5 minutes and a standard deviation of 1.5 minute. If a random sample of 36 customers is selected, what is the probability that the sample mean is less than 4.5 minutes? Round your answer to four decimal places.

QUESTION 2 The amount of time a bank teller spends with each customer has a population mean of 5 minutes and a standard deviation of 1.5 minute. If a random sample of 36 customers is selected, what is the probability that the sample mean is less than 4.5 minutes? Round your answer to four decimal places.

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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QUESTION 2 The amount of time a bank teller spends with each customer has a population mean of 5 minutes and a standard deviation of 1.5 minute. If a random sample of 36 customers is selected, what is the probability that the sample mean is less than 4.5 minutes? Round your answer to four decimal places. QUESTION 3 The daily electrical energy consumption (in Watts) during July for a random sample of 18 households was recorded. The mean was 3399 W and the standard deviation was 316 W. Assume the underlying distribution of the consumption is normal. Find the marging of error E of the 95% confidence interval for the mean daily electrical energy consumption during that month. Round your answer to two decimal places.
Transcribed Image Text:QUESTION 2 The amount of time a bank teller spends with each customer has a population mean of 5 minutes and a standard deviation of 1.5 minute. If a random sample of 36 customers is selected, what is the probability that the sample mean is less than 4.5 minutes? Round your answer to four decimal places. QUESTION 3 The daily electrical energy consumption (in Watts) during July for a random sample of 18 households was recorded. The mean was 3399 W and the standard deviation was 316 W. Assume the underlying distribution of the consumption is normal. Find the marging of error E of the 95% confidence interval for the mean daily electrical energy consumption during that month. Round your answer to two decimal places.
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