MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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You wish to test the claim that Washington residents (Group 2) have a higher
average monthly bill for their health insurance than Idaho residents (Group 1) at
a significance level of a=0.02.
Ho: H1- H2 =0
Ha: H1 - H2 < 0
You believe both populations are normally distributed, but you do not know the
standard deviations for either or that they have the same standard deviation.
You obtain a sample of size 21 with a mean of 87.6 and a standard deviation
of 9.5 from the Idaho residents.
You obtain a sample of size 13 with a mean of 97.5 and a standard deviation
of 10.5 from the Washington residents.
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Transcribed Image Text:You wish to test the claim that Washington residents (Group 2) have a higher average monthly bill for their health insurance than Idaho residents (Group 1) at a significance level of a=0.02. Ho: H1- H2 =0 Ha: H1 - H2 < 0 You believe both populations are normally distributed, but you do not know the standard deviations for either or that they have the same standard deviation. You obtain a sample of size 21 with a mean of 87.6 and a standard deviation of 9.5 from the Idaho residents. You obtain a sample of size 13 with a mean of 97.5 and a standard deviation of 10.5 from the Washington residents.
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