An electricity conservation NGO has published figures on the number off kilowatt-hours (kWh) used annually by various home appliances. It is claimed that a vacuum cleaner uses an average of 47 kWh per year. If a random sample off 39 homes included in a planned study indicates that vacuum cleaners used an average of 41 kWh per year with a standard deviation of 12.9 kWh, does. this suggest that the 0.05 level of significance that vacuum cleaners use, on average, less than 45 kWh annually? Use the p-value approach.
An electricity conservation NGO has published figures on the number off kilowatt-hours (kWh) used annually by various home appliances. It is claimed that a vacuum cleaner uses an average of 47 kWh per year. If a random sample off 39 homes included in a planned study indicates that vacuum cleaners used an average of 41 kWh per year with a standard deviation of 12.9 kWh, does. this suggest that the 0.05 level of significance that vacuum cleaners use, on average, less than 45 kWh annually? Use the p-value approach.
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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An electricity conservation NGO has published figures on the number of kilowatt-hours (kWh) used annually by various home appliances. It is claimed that a vacuum cleaner uses an average of 47 kWh per year. If a random sample of 39 homes included in a planned study indicates that vacuum cleaners used an average of 41 kWh per year with a standard deviation of 12.9 kWh, does this suggest that the 0.05 level of significance that vacuum cleaners use, on average, less than 45 kWh annually? Use the p-value approach.
Transcribed Image Text:An electricity conservation NGO has published figures on the number
off kilowatt-hours (kWh) used annually by various home appliances. It is claimed
that a vacuum cleaner uses an average of 47 kWh per year. If a random sample
off 39 homes included in a planned study indicates that vacuum cleaners used
an average of 41 kWh per year with a standard deviation of 12.9 kWh, does.
this suggest that the 0.05 level of significance that vacuum cleaners use, on
average, less than 45 kWh annually? Use the p-value approach.
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