Inference about Two Means: Independent Samples Test hypotheses regarding the dif

Question

Inference about Two Means: Independent Samples Test hypotheses regarding the difference of two independent means. (Classical Approach) MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. Provide an appropriate response. 8) Find the test statistic, t, to test the hypothesis that 1-Ha. Two samples are randomly selected and come from populations that are normal. The sample statistics are given below. 1-25 n2-30 -28-26 s1 = 1.5 s,-1.9 A) 1.986 B) 3287 C) 2.892 D) 4.361 9) Find the test statistic, t, to test the hypothesis that AS-Ar Two samples are randomly selected and come from populations that are normal. The sample statistics are given below. 14 m2 -12 -18-19 1-2.552 -2.8 A)-0.954 B)-0.915 C)-1.558 D)-0.909 10) Find the test statistic, t, to test the hypothesis that > -Two samples are randomly selected and

Explanation / Answer

8)

Option (D) is correct

9)

Option (A) is correct

x1(bar) 28.00 x2(bar) 26.00 s1 1.50 s2 1.90 n1 25 n2 30 SE = sqrt[ (s12/n1) + (s22/n2) ] (s12/n1) 0.0900 (s22/n2) 0.1203 SE 0.4586 DF = (s12/n1 + s22/n2)2 / { [ (s12 / n1)2 / (n1 - 1) ] + [ (s22 / n2)2 / (n2 - 1) ] } [ (s12 / n1)2 / (n1 - 1) ] 0.000 [ (s22 / n2)2 / (n2 - 1) ] 0.00 (s12/n1 + s22/n2)2 0.04 DF = 53

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