Independent random samples from normal populations produced the results shown in the next table. Sample 1 _______________Sample
Question:
Sample 1 _______________Sample 2
1.2 .............................. 4.2
3.1 .............................. 2.7
1.7 .............................. 3.6
2.8 .............................. 3.9
3.0
a. Calculate the pooled estimate of σ2.
b. Do the data provide sufficient evidence to indicate that μ2 > μ1? Test using a = .10.
c. Find a 90% confidence interval for (μ1 - μ2).
d. Which of the two inferential procedures, the test of hypothesis in part b or the confidence interval in part c, provides more information about (μ1 - μ2)?
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Some preliminary calculations are a b H 0 1 2 0 H a 1 2 0 The test statistic is t The rejection regi...View the full answer
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Related Book For 
Statistics For Business And Economics
ISBN: 9780134506593
13th Edition
Authors: James T. McClave, P. George Benson, Terry Sincich
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