2. A random sample of 30 warehouses was selected as part of astudy on electricity usage, and the number of kilowatt-hours(kWh) was recorded for each warehouse in the sample for theMarch quarter of 2019. The average usage was found to be375kWh. In a very large study in the March quarter of theprevious year it was found that the standard deviation of theusage was 81kWh. It is believed that the standard deviationmay have changed from the previous year. From the smalldata set in 2019, the sample standard deviation is 91.5kWh.Assuming that the usage is normally distributed, calculate a99% confidence interval for the mean usage in the Marchquarter of 2019.

Given information: The sample size is n = 30. The sample mean usage in March quarter of 2019 is…

. A random sample of 30 warehouses was selected as part of a tudy on electricity usage, and the number of kilowatt-hours kWh) was recorded for each warehouse in the sample for the March quarter of 2019. The average usage was found to be 75kWh. In a very large study in the March quarter of the revious year it was found that the standard deviation of the sage was 81kWh. It is believed that the standard deviation

. A random sample of 30 warehouses was selected as part of a tudy on electricity usage, and the number of kilowatt-hours kWh) was recorded for each warehouse in the sample for the March quarter of 2019. The average usage was found to be 75kWh. In a very large study in the March quarter of the revious year it was found that the standard deviation of the sage was 81kWh. It is believed that the standard deviation

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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