1- In order to determine the proportion ofdefects in a shipment, 40 parts from it arerandomly selectedfor testing. The shipment consists of 90boxes, each of which contain 200 parts. Inorder to not haveto open many boxes, two boxes arerandomly chosen. From each of theseboxes, 20 parts arerandomly chosen for testing. Whatsampling method is being used?

Given, To determine the proportion of defects in a shipment, 40 parts from it are randomly selected…

Answered: 1- In order to determine the proportion…

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 7CR

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Similar questions

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List the sample space of each experiment. Picking a one-digit number
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The number of cavities that thirty-year-old Americans have had in their lifetimes is 8. Do twenty- average year-olds have a different number of cavities? The data show the results of a survey of 16 twenty-year-olds who were asked how many cavities they have had. Assume that the distrbution of the population is normal. 6, 12, 8, 6, 10, 6, 8, 11, 8, 8, 6, 7, 6, 10, 7, 11 What can be concluded at the a = 0.10 level of significance? a. For this study, we should use Select an answer b. The null and alternative hypotheses would be: Ho: 2 Select an answer V 7v||Select an answerY c. The test statistic ? (please show your answer to 3 decimal places.) d. The p-value = (Please show your answer to 4 decimal places.) e. The p-value is ?v f. Based on this, we should Select an answer v the null hypothesis. g. Thus, the final conclusion is that lor O The data suggest that the population mean number of cavities for twenty-year-olds is not significantly different from 8 at a = 0.10, so there is…
A consumer-testing agency wants to evaluate the claim made by a manufacturer of discount tires. The manufacturer claims that its tires can be driven at least 35,000 miles before wearing out. To determine the average number of miles that can be obtained from the manufacturer’s tires, the agency randomly selects 60 tires from the manufacturer’s warehouse and places the tires on 15 cars driven by test drivers on a 2-mile oval track. The number of miles driven (in thousands of miles) until the tires are determined to be worn out is given in the following table. Car Miles Driven 1 25 2 27 3 35 4 42 5 28 6 37 7 40 8 31 9 29 10 33 11 30 12 26 13 31 14 28 15 30 Average 31.47 Standard 5.04 Agency would like to know if the manufacturer’s claim is false. Carryout an appropriate hypothesis test (use 1% significance level). Check any assumptions you think are relevant before doing the text.
A quality control marketing manager orders parts and the parts are shipped in lots of sizes 15. When lots arrive, the quality manager randomly inspect 4 parts from a lot. The lot is rejected if at least one of the parts is defective. Of all lots of size 15 that arrive, 20% are have 5 defective parts and 80 percent have 2 defective parts. What proportion of lots are rejected by the manager?
A consumer testing agency wants to evaluate the claim made by a manufacturer of discount tires. The manufacturer claims that its tires can be driven at least 35,000 miles before wearing out. To determine the average number of miles that can be obtained from the manufacturer’s tires, the agency randomly selects 60 tires from the manufacturer’s warehouse and places the tires on 15 cars driven by test drivers on a 2-mile oval track. The number of miles driven (in thousands of miles) until the tires are determined to be worn out is given in the following table. Car 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 n y s Miles Driven 25 27 35 42 28 37 40 31 29 33 30 26 31 28 30 15 31.47 5.04 a. Place a 99% confidence interval on the average number of miles driven, m, prior to the tires wearing out. b. Is there significant evidence (a 5 .01) that the manufacturer’s claim is false? What is the level of significance of your test? Interpret your findings.

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1- In order to determine the proportion of defects in a shipment, 40 parts from it are randomly selected for testing. The shipment consists of 90 boxes, each of which contain 200 parts. In order to not have