4) A firm would like to estimate the mean age of all people in the civilian labor force. What sizesample would be required to estimate the mean age of all people in the civilian labor force accurateto within 0.75 year of the estimate at the 95% confidence level, given that o = 15.26 years? 2) High blood pressure has been identified as a risk factor for heart attacks and strokes. Theproportion of U.S. adults with high blood pressure is 0.3. A sample of 81 U.S. adults is chosen.a) What is the sampling distribution of ?p°b) Find the probability that the proportion of individuals in the sample who have high bloodpressure is between 0.24 and 0.35.c) Find the probability that less than 26% of the people in the sample have high blood pressure.d) Find the probability that more than 28% of the people in the sample have high blood pressure.e) Would it be unusual if more than 31% of the individuals in the sample of 81 had high bloodpressure? Explain.

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4) A firm would like to estimate the mean age of all people in the civilian labor force. What size sample would be required to estimate the mean age of all people in the civilian labor force accurate to within 0.75 year of the estimate at the 95% confidence level, given that o = 15.26 years?

4) A firm would like to estimate the mean age of all people in the civilian labor force. What size sample would be required to estimate the mean age of all people in the civilian labor force accurate to within 0.75 year of the estimate at the 95% confidence level, given that o = 15.26 years?

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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The work week for adults in the US that work full time is normally distributed with a mean of 47 hours. A newly hired engineer at a start-up company believes that employees at start-up companies work more on average then most working adults in the US. She asks 12 engineering friends at start-ups for the lengths in hours of their work week. Their responses are shown in the table below. Test the claim using a 5% level of significance. Give answer to at least 4 decimal places. Hours 46 49 58 55 49 68 45 48 46 45 51 50 What are the correct hypotheses? H0: hoursH1: hours Based on the hypotheses, find the following:Test Statistic=p-value= The correct decision is to . The correct summary would be: that the mean number of hours of all employees at start-up companies work more than the US mean of 47 hours.
The work week for adults in the US that work full time is normally distributed with a mean of 47 hours. A newly hired engineer at a start-up company believes that employees at start-up companies work more on average then most working adults in the US. She asks 12 engineering friends at start-ups for the lengths in hours of their work week. Their responses are shown in the table below. Test the claim using a 10% level of significance. Give answer to at least 4 decimal places. Hours 49 40 58 52 49 70 49 59 47 49 53 55 What are the correct hypotheses? H0: hoursH1: hours Based on the hypotheses, find the following:Test Statistic=p-value= The correct decision is to . The correct summary would be: that the mean number of hours of all employees at start-up companies work more than the US mean of 47 hours.
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4) A firm would like to estimate the mean age of all people in the civilian labor force. What siz sample would be required to estimate the mean age of all people in the civilian labor force accurae to within 0.75 year of the estimate at the 95% confidence level, given that o = 15.26 years?
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A firm would like to estimate the mean age of all people in the civilian labor force. What size sample would be required to estimate the mean age of all people in the civilian labor force accurate to within 0.75 year of the estimate at the 95% confidence level, given that o = 15.26 years?