befor phones, a person made on rerage 2.8 phone calls per day. She believes that the number of Lone calls made per day today is higher. A random sample of people had a sample mean x = 3.1. The standard deviation for Le population found by a previous study is o = 0.8. Test the pothesis that the population mean is 2.8 against the ternative hypothesis that the population mean is greater than 8, at the 0.05 level of significance.
befor phones, a person made on rerage 2.8 phone calls per day. She believes that the number of Lone calls made per day today is higher. A random sample of people had a sample mean x = 3.1. The standard deviation for Le population found by a previous study is o = 0.8. Test the pothesis that the population mean is 2.8 against the ternative hypothesis that the population mean is greater than 8, at the 0.05 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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Transcribed Image Text:A researcher knew that before cell phones, a person made on
average 2.8 phone calls per day. She believes that the number of
phone calls made per day today is higher. A random sample of
30 people had a sample mean x = 3.1. The standard deviation for
the population found by a previous study is o = 0.8. Test the
hypothesis that the population mean is 2.8 against the
alternative hypothesis that the population mean is greater than
at the 0.05 level of significance.
2.8,at
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