Iverage an omobille insur iceT $605. Suppose that in a simple random sample of 80 residents of New York, for most recent year their average expenditure was $638.62 with the standard deviation of $106.05. Based on these data, examine whether th average annual insurance for motorists in New York might be different from that in national level. Using the 0.05 level of significance, what conclusion do you reach? Also, construct and interpret 95% confidence interva for the population mean. Is the hypothesized mean within the interval? Is this consistent with the findings o the hypothesis test conducted?

MATLAB: An Introduction with Applications
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Author:Amos Gilat
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According to the Insurance Association in US, the average annual expenditure for automobile insurance is
$605. Suppose that in a simple random sample of 80 residents of New York, for most recent year their average
expenditure was $638.62 with the standard deviation of $106.05. Based on these data, examine whether the
average annual insurance for motorists in New York might be different from that in national level. Using the
0.05 level of significance, what conclusion do you reach? Also, construct and interpret 95% confidence interval
for the population mean. Is the hypothesized mean within the interval? Is this consistent with the findings of
the hypothesis test conducted?
Transcribed Image Text:According to the Insurance Association in US, the average annual expenditure for automobile insurance is $605. Suppose that in a simple random sample of 80 residents of New York, for most recent year their average expenditure was $638.62 with the standard deviation of $106.05. Based on these data, examine whether the average annual insurance for motorists in New York might be different from that in national level. Using the 0.05 level of significance, what conclusion do you reach? Also, construct and interpret 95% confidence interval for the population mean. Is the hypothesized mean within the interval? Is this consistent with the findings of the hypothesis test conducted?
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