ural towns give a life expectancy of x, = 72.6 years with a standard deviation of s, = 6.66 years. A sample of 8 people from larger towns give X, = 70 years and s, = 6.43 years. Does this provide evidence that people living in rural Idaho communities have different life expectancy than those in more urban communities? Use a 10% level of significance.
ural towns give a life expectancy of x, = 72.6 years with a standard deviation of s, = 6.66 years. A sample of 8 people from larger towns give X, = 70 years and s, = 6.43 years. Does this provide evidence that people living in rural Idaho communities have different life expectancy than those in more urban communities? Use a 10% level of significance.
MATLAB: An Introduction with Applications
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ISBN:9781119256830
Author:Amos Gilat
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Chapter1: Starting With Matlab
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Transcribed Image Text:Mike thinks that there is a difference in quality of life between rural and urban living. He collects information from obituaries in
newspapers from urban and rural towns in Idaho to see if there is a difference in life expectancy. A sample of 13 people from rural towns
give a life expectancy of x,
= 70 years and s, = 6.43 years. Does this provide evidence that people living in rural Idaho communities have different life expectancy
= 72.6 years with a standard deviation of s, = 6.66 years. A sample of 8 people from larger towns give
than those in more urban communities? Use a 10% level of significance.
(a) State the null and alternative hypotheses: (Type “'mu_r" for the symbol u, , e.g. mu_r not = mu_u for the means are not equal,
mu_r > mu_u for the rural mean is larger, mu_r < mu_u , for the rural mean is smaller. )
Ho =
Ha =
(b) The degree of freedom is
(c) The test statistic is
(d) Based on this data, Mike concludes:
OA. There is not sufficient evidence to show that life expectancies are different for rural and urban communities.
B. The results are significant. The data seems to indicate that people living in rural communities have a different life expectancy than
those in urban communities.
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