Please help me with question 1 t/1/Tutoriais76206.par1/ 1100%Tutorials 6This tutorial checks your understanding of testing hypothesis about the population mean whenpopulation standard deviation is known and unknown.Question 1A mail order firm claims that new procedures enable it to dispatch orders more quickly thanpreviously. Records show that the previous average delay was 20 days. A random of 17 ordersusing the new procedure showed a delay time of 18 days with a sample standard deviation of 2.5days. Is the claim made for the new procedures supported at the 5% level?Question 2In the lecture you tested the null hypothesis that college graduate students work longer than 40hours per week on average. Now use gss.sav file and test the hypothesis that all full-time workerswork for 40 hours per week on average (variable hrsl).a. What are the null and alternative hypotheses?b. Test the hypothesis and write a brief summary of your conclusions.c. Explain the difference between the standard deviation of your sample and the standarderror of the mean.d. If your sample size were doubled, how would you expect the value of S.D to change?How would the value of the standard error of the mean change? Estimate both the S.Dand the standard error for a sample twice as large.e. What is the 95% CI for the average number of hours per week by full-time workers? Giveyour conclusion on the hypothesis testing using the 95% CI.f. Based on the 95% CI for the mean difference, can you reject the null hypothesis that theaverage population value for hours worked is 43 hours? Explain.Question 3cav [DataSet1] -.."Output1 (Docume..Output5.spv [Doc.Tutorials 6 - Google.W

Name: Please help me with question 1 t/1/Tutoriais76206.par1/ 1100%Tutorials
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Description: Please help me with question 1 t/1/Tutoriais76206.par1/ 1100%Tutorials 6This tutorial checks your understanding of testing hypothesis about the population mean whenpopulation standard deviation is known and unknown.Question 1A mail order firm claims