QUESTION 1A Hi-Tech company has introduced a new flash disk. Some dealers and customers have complained that some of the new disks aredefective. In order to investigate this the company randomly tested n disks and found that 7.22% were defective. Find the appropriatesample size necessary to achieve a margin of error of 0.040 in order to construct a 97% confidence interval for the proportion of all flashdisks that are defective. Round your answer to the nearest integer (whole number).

Givensample proportion(p^)=7.22%=0.0722Margin of error(E)=0.040confidence level=97%

Answered: A Hi-Tech company has introduced a new…

College Algebra (MindTap Course List)

12th Edition

ISBN:9781305652231

Author:R. David Gustafson, Jeff Hughes

Publisher:R. David Gustafson, Jeff Hughes

Chapter8: Sequences, Series, And Probability

Section8.7: Probability

Problem 58E: What is meant by the sample space of an experiment?

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What is meant by the sample space of an experiment?
Question 2: At her job, Jackie has been working at her job for a few years now and feels like she, as well as everybody else in her department, is well overdue for a raise. Instead of collecting signatures of her colleagues in support of a pay raise, her boss sends out a poll to all employees in all departments to get a feel for what the others think. Assuming Jackie's boss wants only a 5% margin of error and a 99% confidence interval, what sample size is needed? Even though nobody that works there is not missing half of their body, it is okay if the sample size needed includes a decimal.
question #2 2. A recent survey showed that from a sample of 500 packages delivered by a Postal Service,480 were delivered on time. a) Construct a 95% confidence interval for the proportion of all packages that are delivered on time by the Postal Service. b) The manager of the Postal Services claims that 98 percent of their mail are delivered on time. Test at the 1% significance level to determine whether the true proportion is less than 98 percent.
Question 2 - (Please answer both a and b) A recent survey showed that from a sample of 500 packages delivered by a Postal Service, 480 were delivered on time. a) Construct a 95% confidence interval for the proportion of all packages that are delivered on time by the Postal Service. b) The manager of the Postal Services claims that 98 percent of their mail are delivered on time. Test at the 1% significance level to determine whether the true proportion is less than 98 percent.
Question 3: in a random sample of 870 Professors 270 use written resources for financial planning and 408 use a financial planner. Use this information to determine and 95% confidence interval for the proportion of all professors that use a financial planner as their primary means for financial planning.
Question 1. ) Eyeglassomatic manufactures eyeglasses for different retailers. They test to see how many defective lenses they make. Looking at the type of defects, they found in a three-month time period that out of 34,641 defective lenses, 5865 were due to scratches. Find a 99% confidence interval for the proportion of defects that are from scratches. Question 2). According to the February 2008 Federal Trade Commission report on consumer fraud and identity theft, Arkansas had 1,601 complaints of identity theft out of 3,482 consumer complaints ("Consumer fraud and," 2008). Calculate a 90% confidence interval for the proportion of identity theft in Arkansas. Question 3). In 2013, the Gallup poll asked 1,039 American adults if they believe there was a conspiracy in the assassination of President Kennedy, and found that 634 believe there was a conspiracy ("Gallup news service," 2013). Estimate the proportion of American’s who believe in this conspiracy using a 98% confidence…

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