Mathematics

8-56. Of 1000 randomly selected cases of lung cancer, 823

Mathematics, Probability and Statistics / By

8-56. Of 1000 randomly selected cases of lung cancer, 823 resulted in death within 10 years. (a) Calculate a 95% two-sided confidence interval on the death rate from lung cancer. (b) Using the point estimate of p obtained from the preliminary sample, what sample size is needed to be 95% confident that the error in estimating the true …

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W Muue The school of Industrial Engineering and Management would like to add a module into the curriculum to help students increase their scores. Scores of 10 random students collected before and after the module is applied are shown below: Student Pre – module score Post-module score 77 80 70 73 75 a. At 5% level of significance, should the school still add the module in the curriculum? b. Construct the 99% confidence interval for pl – 112 = ud from these data.

Mathematics, Probability and Statistics / By

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7. Information supplied by a mail-order business for 12 cities is shown in Table P-7.

Mathematics, Probability and Statistics / By

7. Information supplied by a mail-order business for 12 cities is shown in Table P-7. a. Determine the fitted regression line. b. Calculate the standard error of the estimate. c. Determine the ANOVA table. d. What percentage of the variation in mail orders is explained by the number of catalogs distributed? e. Test to determine …

7. Information supplied by a mail-order business for 12 cities is shown in Table P-7. Read More »