20. The following data refer to the number of deaths per 10,000 adults in a large Eastern...

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20. The following data refer to the number of deaths per 10,000 adults in a large Eastern city in the different seasons for the years 1982 to 1986.

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(a) Assuming a two-factor model, estimate the parameters.

(b) Test the hypothesis that death rates do not depend on the season. Use the 5 percent level of significance.

(c) Test, at the 5 percent level of significance, the hypothesis that there is no effect due to the year.

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