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Hypothesis test for difference between two means:
A manufacturer produces both a deluxe and a standard model of an automatic vehicle designed for home use. Selling prices obtained from a sample of retail outlets follow.
Model Price ($)
Retail Outlet
Deluxe
Standard
1
39
27
5
40
30
2
28
6
34
3
45
35
7
29
4
38
a) The manufacturer's suggested retail prices for the two models show a $10 price per ferential. Use a 0.05 level of significance and test that the mean difference between the prices of the two models is $10.
b) What is the 95% confidence interval for the difference between the mean prices of the two models?
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What statistical procedure was used to analyze data in study B?
The researcher computes the sum of squares for groups as SSG = 40030 and the sum of squares for error as SSE = 414780. The numerical value of the ANOVA F statistic is
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The hypotheses tested by the one-way ANOVA F test - Evaluate the P-value of the ANOVA F test
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What is the possibility that for a arbitrarily selected customer the service time could exceed 3 minutes?
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How large should n be so that a 90% confidence interval for µ has a margin of error and What is the P-value for a test of the hypotheses
You have two unbiased estimates, e 1 and e 2 , of a quantity with variances V 1 and V 2 respectively, and covariance Cov {e1,e 2 } = C. Form a new unbiased estimate:
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