3. An experiment is conducted to test whether the installation of cavity-wall insulation reduces the amount of energy consumed in houses. Out of twenty otherwise similar houses on a housing estate, ten are selected at random for insulation. The total energy consumption over a winter is measured for each house. The data, in are as follows. Without insulation With insulation 12.6, 11.8, 12.8, 11.4, 14.4, 12.3, 11.5, 10.8, 9.9, 9.5, 10.0,10.4, 10.7 11.8, 13.2, 11.0, 11.8 7.5,11.8, 10.1 Use a Mann Whitney U-test to test the null hypothesis that the insulation has no effect against the alternative that it reduces energy consumption. Use the 5% level of significance.
3. An experiment is conducted to test whether the installation of cavity-wall insulation reduces the amount of energy consumed in houses. Out of twenty otherwise similar houses on a housing estate, ten are selected at random for insulation. The total energy consumption over a winter is measured for each house. The data, in are as follows. Without insulation With insulation 12.6, 11.8, 12.8, 11.4, 14.4, 12.3, 11.5, 10.8, 9.9, 9.5, 10.0,10.4, 10.7 11.8, 13.2, 11.0, 11.8 7.5,11.8, 10.1 Use a Mann Whitney U-test to test the null hypothesis that the insulation has no effect against the alternative that it reduces energy consumption. Use the 5% level of significance.
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

Transcribed Image Text:3. An experiment is conducted to test whether the installation of cavity-wall insulation
reduces the amount of energy consumed in houses. Out of twenty otherwise similar
houses on a housing estate, ten are selected at random for insulation. The total energy
consumption over a winter is measured for each house. The data, in are as follows.
Without insulation
With insulation
12.6, 11.8, 12.8, 11.4, 14.4, 12.3, 11.5, 10.8, 9.9, 9.5, 10.0,10.4, 10.7 11.8,
13.2, 11.0, 11.8
7.5,11.8, 10.1
Use a Mann Whitney U-test to test the null hypothesis that the insulation has no effect
against the alternative that it reduces energy consumption. Use the 5% level of significance.
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