y: o.oooa3? The following applies to Questions 7 to 9 We would like to compare t

Question

y: o.oooa3? The following applies to Questions 7 to 9 We would like to compare the current unemployment rates in Canada and the U.S. In a random sample of 400 Canadians, 23 of them are found to be unemployed. In a random sample of 300 Americans, 12 are unemployed. Question 7 (1 point) What is the margin of error 96 interval for the true difference in proportions of Canadian and American adults that are unemployed Keep & decimal places in intermediate calculations and report your final answer rounded to 3 decimal places. Your Answer: 76% Answer OS Save Question 8 (1 point) 4oo ?.OOO135 We conduct a hypothesis test of Hgj Py vs. y to compare the unemployment rates in the two countries. The value of the z test statistic its Keep 6 decimal places in intermediate calculations and report your final answer Your Answer: round etadeomy places. both tail Question 9 (1 point) The two proportionz test in the previous question can also be conducted as a chi-square test of homogeneity. At the 10% level of significance, what can we conclude about homogeneity of the population proportions of Canadians and Americans who are unemployed? A) There is insufficient evidence that they are homogeneous. O B) There is insufficient evidence that they are not homogeneous ?C) There is sufficient evidence that they are homogeneous. D) There is sufficient evidence that they are not homogeneous Save

Explanation / Answer

9. The test is a two tailed test. So,

p - value = 2*P(z > 1.05) = 0.2931

Since p - value is greater than 0.10, we do not reject Ho.

Option B is correct.

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