Course Home Do Google Chrome revor Secure ! https://wwww.mat aspx rkld-4605901 7

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Course Home Do Google Chrome revor Secure ! https://wwww.mat aspx rkld-4605901 71 &questionId;=1&flushedzfalse;&cld-4724730;&centerwinzyes; | ao, TUESDAY I THURSDAY STT 315 Trevor Perry 12/5/17 9:58 AM Trevor Homework: Home work 11 - Chapter 6.5 & 6.7 Score: 0 of 1 pt 6.5.71-T Save MyStatLab 6 of 14 (2 complete) | HW Score: 5.56%, 2.5 of 45 pts Question Help In a sample of 60 stores of a certain company, 50 violated a scanner accuracy standard. It has been demonstrated that the conditions for a valid large-sample confidence interval for the true proportion of the stores that violate the standard were not met. Determine the number of stores that must be sampled in order to estimate the true proportion to within 0.04 with 95% confidence using the large-sample method. O My Courses Course Home Assignments Study Plan The number of stores that must be sampled is (Round up to the nearest whole number as needed) StatCrunch eTexxt Chapter Contents Tools for Succes8 Multimedia Library Purchase Options Course Tools Enter your answer in the answer box and then click Check Answer Clear Al Check Answer 9.58 AM 12/5/2017

Explanation / Answer

Solution

Proportion voilated accuracy standard = 50/60 = 5/6

Margin of error = +-z0.025*Standard error

Where, Standard error = ((p(1-p))/n)0.5

So, 0.04 = 1.96*((5/6)(1/6)/n)0.5

So, n = 333

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