Suppose the owner of a fruit stand observes that in a sample of 93 customers, 82% purchaselemons.(a) Find the lower limit of the 95% confidence interval for the proportion of all customers whopurchase lemons.0.712O 0.7420.7430.762(b) Find the upper limit of the 95% confidence interval for the proportion of all customers whopurchase lemons.O 0.8270.8770.8980.903(c) Determine the minimum sample size required to be 95% confident that the sample proportion iswithin 1.6% of the population proportion. Use the results of the above study as an estimate of thesample proportion.392215375211080(d) Determine the minimum sample size required to be 95% confident that the sample proportion iswithin 1.6% of the population proportion. Do not use the results of the above study to estimate thesample proportion.392215375211080

The sample size, i.e., the sampled number of customers, n=93.The sample proportion of customers, who…

Answered: Suppose the owner of a fruit stand…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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A random survey of 500 students was conducted from a population of 2,200 students to estimate the proportion who had part-time jobs. The sample showed that 205 had part-time jobs. Calculate the 95 percent confidence interval for the true proportion of students who had part-time jobs. (Round your answers to 3 decimal places.) The 95% confidence interval is from to
A smart phone manufacturer is interested in constructing a 90% confidence interval for the proportion of smart phones that break before the warranty expires. 94 of the 1521 randomly selected smart phones broke before the warranty expired. a. With 90% confidence the proportion of all smart phones that break before the warranty expires is between and b. If many groups of 1521 randomly selected smart phones are selected, then a different confidence interval would be produced for each group. About percent of these confidence intervals will contain the true population proportion of all smart phones that break before the warranty expires and about percent will not contain the true population proportion.
A recent survey showed that 42% of US employers were likely to require higher employee contributions for health care coverage. Suppose the survey was based on a sample of 500 companies. Find the 99% confidence interval for the proportion of all companies likely to require higher employee contributions for health care coverage. (Round to four decimal places)
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1
A district official intends to use the mean of a random sample of 150 sixth graders from a very large school district to estimate the mean score that all the sixth graders in the district would get if they took a certain arithmetic achievement test. If, based on experience, the official knows that = 9.4 for such data, suppose that the district official takes her sample and gets = 61.8. Use all the given information to construct a 99% confidence interval for the mean score of all the sixth graders in the district.
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A certain article indicates that in a sample of 1,000 dog owners, 690 said that they take more pictures of their dog than of their significant others or friends, and 490 said that they are more likely to complain to their dog than to a friend. Suppose that it is reasonable to consider this sample as representative of the population of dog owners. Construct a 95% confidence interval for the proportion of dog owners who are more likely to complain to their dog than to a friend. (Use a table or technology. Round your answers to three decimal places.)

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