A grocery store manager states the the weight of an apple in ounces follows an unknowndistribution with population mean/expectation of 7.5 ounces and a population standard deviation of1.33 ounce.The manager takes a random sample of 25 apples and computes the sample mean weight of these25 apples, X.What is the mean and standard deviation of the sample mean, X ?Mean is 7.5/5 and standard deviation is 7.5O Mean is 7.5 and standard deviation is 1.33/5Mean is 7.5 and standard deviation is 1.33Mean is 7.5/5 and standard deviation is 7.5/5

the weight of an apple in ounces follows an Unknown distribution with Mean(μ)=7.5 standard…

Answered: A grocery store manager states the the…

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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The scores on a standardized test are normally distributed with a mean of 85 and standard deviation of 10. What test score is 1.7 standard deviations above the mean?
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Forty refrigerators from two different models of a refrigerator manufacturer are compared to see if the smaller model uses less energy than the larger model. The energy was measured in kilowatt hours per month (kwh/mo). From years of testing these models, it is known that the standard deviation of kwh/mo is 34 kwh/mo for the smaller model and 40 kwh/mo for the larger one. From this survey, the sample means and standard deviations are 125 and 34, and 90 and 40, respectively. If we conduct a hypothesis test, the decision and conclusion are Group of answer choices Do not reject the null hypothesis and conclude that the average kwh/mo are the same. Reject the null hypothesis and conclude that the average kwh/mo are different. Reject the null hypothesis and conclude that the average kwh/mo for the smaller refrigerator is higher than for the larger model. Do not reject the null hypothesis and conclude that the average kwh/mo for the smaller refrigerator is higher than for…

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