In a certain survey, 524 people chose to respond to this question: "Should passwords be replaced with biometric security (fingerprints, etc)?" Among the respondents, 54% said "yes." We want to test the claim that more than half of the population believes that passwords should be replaced with biometric security. Completeparts (a) through (d) below,a. Are any of the three requirements violated? Can a test about a population proportion using the normal approximation method be used?O A. The conditions np 25 and nq 25 are not satisfied, so a test about a population proportion using the normal approximation method cannot be used.B. One of the conditions for a binomial distribution are not satisfied, so a test about a population proportion using the normal approximating method cannot be used.O C. All of the conditions for testing a claim about a population proportion using the normal approximation method are satisfied, so the method can be used.O D. The sample observations are not a random sample, so a test about a population proportion using the normal approximating method cannot be used.

Answered: pertain survey, 524 people chose to…

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 physical therapist wants to determine the difference in the proportion of men and women who participate in regular sustained physical activity. What sample size should be obtained if she wishes the estimate to be within five percentage points with 95% confidence, assuming that (a) she uses the estimates of 22.9% male and 19.5% female from a previous year? (b) she does not use any prior estimates?
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Studies indicate that about 10 percent of polar bears weigh more than 1,000 pounds. A biologist studying the bearsthinks that percent might be too high. From a random sample of polar bears, the biologist found only 8 percent ofthe sample weighing over 1,000 pounds. Which of the following is the most appropriate method for the biologist’sstudy?(A) A one-sample -test for a sample proportion(B) A one-sample -test for a population proportion(C) A one-sample -test for a difference in population proportions(D) A two-sample -test for a difference in sample proportions(E) A two-sample -test for a difference in population proportions
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Different chemicals are tested to check their effects on different cloth materials. The chemicals will be used in one of the finishing processes. Five cloth materials are selected for testing and four chemicals will be used on each cloth material sample. a) Are there significant differences between four different chemicals? ( = .05) b) Considering your answers in part a., perform the appropriate tests to determine which chemicals differ significantly.

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