Suppose that the time required to complete a 1040R tax form is normal distributed with a mean of 100 minutes and a standard deviation of 10 minutes. Whatproportion of 1040R tax forms will be completed in at most 97 minutes? Round your answer to at least four decimal places.0XŚ

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Answered: Suppose that the time required 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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Mensa is a society for "geniuses." One way to qualify for membership is having an IQ at least 2.5 standard deviations above average. IQs are approximately Normally distributed, according to the WAIS scale. The area to the left of a qualifying Mensa score is 0.9938, what percent of people should qualify? Note: If you use the table to look up the answer, that will give a decimal number. You must then multiply by 100 to convert the decimal to a percent. After multiplying by one hundred, round your answer to two decimal places. Your answer: Need help on this question? Getahint dewer point Show answT napoints)
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The IRS claims it takes an average of 3.7 hours to complete a 1040 tax form. Assume the time t the form is normally distributed with a standard deviation of 15 minutes or 0.25 hours. complete Use the Cumulative Z-Score Table to answer the following questions. Write your answer as a percent using 2 decimal places. What percent of people would you expect to complete the form in less than 3.45 hours? What percent of people would you expect to complete the form-in more than 3.45 hours? What percent of people would you expect to complete the form in less than 3.4 hours? What percent of people would you expect to complete the form in more than 3.4 hours? What percent of people would you expect to complete the form between 3.4 and 3.45 hours?
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Suppose that the time required to complete a 1040R tax form is normal distributed with a mean of 100 minutes and a standard deviation of 10 minutes. What proportion of 1040R tax forms will be completed in at most 97 minutes? Round your answer to at least four decimal places. 0 X 5