evenhwsol - Assigned Even-Numbered Homework Solutions...

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Assigned Even-Numbered Homework Solutions Statistics for Business and Economics. McClave, Benson, Sincich. 11 th edition, Prentice Hall. 4.90 Draw pictures! a. The z-score corresponding to x 0 is 1.00. So 1.0 = (x 0 – 50) / 3 --> x 0 = 53 b. The z-score corresponding to x 0 is 1.96. So 1.96 = (x 0 – 50) / 3 --> x 0 = 55.88 c. The z-score corresponding to x 0 is –1.645. So –1.645 = (x 0 – 50) / 3 --> x 0 = 45.065 d. For this one, we need to know how much area is between 41 and 50 first: The z-score corresponding to 41 is z = (41 – 50) / 3 = –3 From the table, we know the area under the curve between a z-score of –3 and 0 is .4987. That means there is .8630 – .4987 = .3643 left between 50 and x 0 . The z-score corresponding to x 0 is 1.10. So 1.10 = (x 0 – 50) / 3 --> x 0 = 53.3 e. The z-score corresponding to x 0 is –1.28. So –1.28 = (x 0 – 50) / 3 --> x 0 = 46.16 f. The z-score corresponding to x 0 is 2.33. So 2.33 = (x 0 – 50) / 3 --> x 0 = 56.99
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4.158 a. First we find the sample mean for each of the samples listed:
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evenhwsol - Assigned Even-Numbered Homework Solutions...

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