Mathematics, 06.12.2019 03:31 bricefitzpatrick0429
Adevelopment economist is studying income growth in a rural area of a developing country. the last census of the population of this area, several years earlier, showed that mean household annual income was 425 dollars, and the variance of household income was 2500 (dollars-squared). a current random sample of 100 households yields a sample mean income of $433.75. assume that household annual incomes are approximately normally distributed, and that the population variance is known still to be 2500. test the null hypothesis that population mean income has not increased against the alternative hypothesis that it has increased, at a 1% level of significance.
what is the form of the rejection region that should be used to conduct this hypothesis test?
Answers: 2
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Suppose that sahil knows that 45 people with ages of 18 to 29 voted. without using a calculator, he quickly says then 135 people with ages of 30to 49 voted. is he correct? how might sohil have come up with his answer so quickly?
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Adevelopment economist is studying income growth in a rural area of a developing country. the last c...
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