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The computed test statistic for the appropriate test is O 1.3931 O 3.6426 O -13.2685 O -1.1803

The computed test statistic for the appropriate test is O 1.3931 O 3.6426 O -13.2685 O -1.1803

Holt Mcdougal Larson Pre-algebra: Student Edition 2012
Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter11: Data Analysis And Probability
Section: Chapter Questions
Problem 8CR
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A study was conducted to determine whether remediation in statistics enabled students to be more successful in engineering statistics. Success here means that a student received a grade of 70 or better, and remediation was for one year (students took an equivalent of one year of high school statistics). The following table shows the results of this study: Remedial Nonremedial Sample size 34 150 Number of successes 20 104 The computed test statistic for the appropriate test is O 1.3931 O 3.6426 O -13.2685 O -1.1803
Transcribed Image Text:A study was conducted to determine whether remediation in statistics enabled students to be more successful in engineering statistics. Success here means that a student received a grade of 70 or better, and remediation was for one year (students took an equivalent of one year of high school statistics). The following table shows the results of this study: Remedial Nonremedial Sample size 34 150 Number of successes 20 104 The computed test statistic for the appropriate test is O 1.3931 O 3.6426 O -13.2685 O -1.1803
Two catalysts are being analyzed to determine how they affect the average yield of the chemical process. The higher the yield in percentage, the better the catalyst is. Catalyst A is a commercial catalyst that is currently being used. Catalyst B is developed by our research group based on a geopolymer material. The following table is the summarized result from the test runs in the pilot plant. Based on the normal probability plot, it is valid to assume normal distribution from these data. sample mean 92.0 94.0 sample standard 2.0 1.5 deviation sample size 12 10 Determine the computed p-value to test whether to reject the null hypothesis of equal variance of the average yield from using catalyst A and B at a 5 % level of significance. O 1.28 O 0.64 O 0.28 O 0.20
Transcribed Image Text:Two catalysts are being analyzed to determine how they affect the average yield of the chemical process. The higher the yield in percentage, the better the catalyst is. Catalyst A is a commercial catalyst that is currently being used. Catalyst B is developed by our research group based on a geopolymer material. The following table is the summarized result from the test runs in the pilot plant. Based on the normal probability plot, it is valid to assume normal distribution from these data. sample mean 92.0 94.0 sample standard 2.0 1.5 deviation sample size 12 10 Determine the computed p-value to test whether to reject the null hypothesis of equal variance of the average yield from using catalyst A and B at a 5 % level of significance. O 1.28 O 0.64 O 0.28 O 0.20
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