2. Electric Usage You believe the mean annual kilowatt hour usage of U.S. residential customers is less than 11,500 kwh. You do some research and find that a random sample of 30 residential customers has a mean kilowatt hour usage of 11,400 kwh with a standard deviation of 320 kilowatt hours. You conduct a statistical experiment where H,: u 2 11,500 and H,: u< 11,500. a. Perform the test again and make a new decision by increasing a from 0.01 to 0.05.
2. Electric Usage You believe the mean annual kilowatt hour usage of U.S. residential customers is less than 11,500 kwh. You do some research and find that a random sample of 30 residential customers has a mean kilowatt hour usage of 11,400 kwh with a standard deviation of 320 kilowatt hours. You conduct a statistical experiment where H,: u 2 11,500 and H,: u< 11,500. a. Perform the test again and make a new decision by increasing a from 0.01 to 0.05.
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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2. Electric Usage You believe the mean annual kilowatt hour usage of U.S.
residential customers is less than 11,500 kwh. You do some research and find
that a random sample of 30 residential customers has a mean kilowatt hour
usage of 11,400 kwh with a standard deviation of 320 kilowatt hours. You
conduct a statistical experiment where H,: u 2 11,500 and H,:p<11,500.
a. Perform the test again and make a new decision by increasing a from
0.01 to 0.05.
b. Perform the test again and make a new decision by increasing n from 30
to 50 (use a = 0.01).
Name: Julian Nutter
Chapter 7 Extended Response Problems
C. Perform the test again and make a new decision by increasing n from 30
to 100 (use a = 0.01). T
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