IV (q8-q10) The table from bellow contains the observed frequencies of Yes and N

Question

IV (q8-q10) The table from bellow contains the observed frequencies of Yes and No responses for population 1.2, and 3. Response 2 3 Total Yes 125 100 150 375 No 115 105 135 355 Total 240 205 285 730 bserved Expected Yes 1 123.28 0.024 Yes Yes 3 150 146.4 36 0.088 12.96 No 115 116.71 -1.11 292 0025 No 2 105 99.69 531 28.19 0.28 No 3 135 138.6 0.0935 -3.6 12.96 8. The expected frequency of the Yes responses in population 2 is: B) 112.8 C) 105.3 D) 95.7 A) 764 9. The value is: A) 2.34 C) 5.68 B)0.77 D) 182 10. The p-value is in the interval C) 0.025 to 0.05 D) 0.01 to 0.025 B) 0.005 to 0.01 A) 0.1 to 0.9 Useful formulas: Interval estimate of the differences between the two population means. (o and a known): a/2 +9a tz Test statistic for the difference between two population means (a and a unknown): t- n pitn2p2 Pooled estimate of p: P n, n. Z scores for different values of a: zoozes 1.96 zoos 1.64 zou 1.28

Explanation / Answer

8) option Ci si correct as expected frequency =205*375/730 =105.3

9)option B is correct

10) option A is correct

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