SumI2002FinalA

SumI2002FinalA - COURSE: MSCI 3710 Final Exam Version A...

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The labels on packages of Sugar’swt claim that each package weighs 175 grams. However, a representative of a consumer advocate group believes the mean weight of the package-content is less than 175 grams. To test their belief, a representative of a consumer advocate group selected a random sample of 70 packages. From this sample, the mean and standard deviation were found to be 172 grams and 8 grams, respectively. Test the appropriate hypothesis at the 1% significance level. 1. What is the calculated value of the test statistic? A. +3.22 B. 1.55 C. 2.02 D. -0.23 E. -3.14 * 2. What is the “Reject Ho” region of the test statistic? A. To the left of Z = -2.326 and to the right of Z = 2.326 B. To the left of Z = -2.326 * C. To the left of Z = -1.645 and to the right of Z = 1. 645 D. To the left of t = -1. 645 and to the right of t = 1. 645 E. To the right of Z = 1.645 3. Assuming the calculated value of the test statistic is –1.96, what are the decision and conclusion of the test? A. Reject the null hypothesis, conclude there is sufficient evidence that the package weight is less than 175 grams. B. Fail to reject the null hypothesis, conclude there is insufficient evidence that the package weight is less than 175 grams. * C. Fail to reject the null hypothesis, conclude there is sufficient evidence that the package weight is less than 175 grams. D. Reject the null hypothesis, conclude there is sufficient evidence that the package weight
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This note was uploaded on 03/09/2011 for the course DSCI 3710 taught by Professor Dr.jay during the Spring '08 term at North Texas.

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SumI2002FinalA - COURSE: MSCI 3710 Final Exam Version A...

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