06:19A myopenmath.comA well-known brokerage firm executive claimed that10% of investors are currently confident of meetingtheir investment goals. An XYZ Investor OptimismSurvey, conducted over a two week period, found thatin a sample of 100 people, 18% of them said they areconfident of meeting their goals.Test the claim that the proportion of people who areconfident is larger than 10% at the 0.005 significancelevel.The null and alternative hypothesis would be:Но : р < 0.1 Но: и < 0.1 Но: и > 0.1Ні:р > 0.1 Н1:д > 0.1 Hi:р < 0.1Но: р — 0.1 Но:р > 0.1 Но: д %—D 0.1H1:p + 0.1 H1:p < 0.1 H1:µ # 0.1The test is:two-tailed left-tailed right-tailedThe test statistic is:(to 3 decimals)The p-value is:(to 4decimals)Based on this we:Reject the null hypothesisFail to reject the null hypothesisOuection Holn:inctructor

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Answered: A well-known brokerage firm executive…

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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6. In the past, 70% of a garage's business was with former patrons. Clarence Wade, the owner of the garage, samples 600 repair invoices and finds that for 432 of them, the patron was a repeat customer. a. Develop a 90% confidence interval for the proportion of all current business that is with repeat customers.
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