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What is the resulting 90% confidence interval for µold- µyoung? b) Are we getting taller? Perform the test at the 1% level of significance. Give all relevant output and state your conclusion

What is the resulting 90% confidence interval for µold- µyoung? b) Are we getting taller? Perform the test at the 1% level of significance. Give all relevant output and state your conclusion

MATLAB: An Introduction with Applications
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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  Comparing heights of older and younger people.   People aged 50-60 were selected and measured, as were people aged 20-30.  The statistics for the older crowd were: average: 66.7”, std dev: 5.1”.  The statistics for the younger crowd were: average: 67.4”, std dev 5.5”.  There were 250 people in each of the samples.
a)    What is the resulting 90% confidence interval for µold- µyoung?
b)    Are we getting taller?  Perform the test at the 1% level of significance.  Give all relevant output and state your conclusion.

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