Chapter 10 Problem 3.xlsx

Chapter 10 Problem 3.xlsx - BA 6933 Statistics and...

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BA 6933 Statistics and Quantitative Methods Chapter 10 Problem 3 a Hypothesis test is as follows: : - = 0 : - 0 Sample 1 Sample 2 = 80 = 70 = 104 = 106 σ_1 = 8.4 σ_2 = 7.6 Value of the test statistic for hypothesis tests about - z = - - Do / = (104-106) - 0 / √(8.4)2 / 80 + = -1.53 b Using standard normal distribution table, the area under the curve to the left of z = -1.53 is giv p(z < -1.53) = 0.063 To get the p-value, we must double the tail area since this test is two tailed test.

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