10 May WHAT IS THE SIGNIFICANCE LEVEL?
Test Three Chapters 10 and 11 · Show all of your work · Send back in the assignment link only! Do NOT email it back to me in the message/email area. It will not be graded unless it is in the proper place. · You can scan it to me in that area take photo from your phone send as an attachment but get it back before the due date · Number all 5 steps. Make sure you work is neat and easy to find answers. · Step one 5 pts. Step two 2 pts. Step Three: 5 pts. Step four: 4 pts. Step five: 9 pts. 1. The Pew internet and American Life Project conduct surveys to gauge how the internet and technology impact daily life of individuals families and communities. In a recent survey Pew asked respondents it they thought that computers and technology give people more or less control over their lives. Companies that are involved in innovative technologies use the survey results to better understand their target market. One might suspect hat younger individuals would be more likely to think that computes and technology give them more control over their lives than older respondents. A subset of the data from this survey shows the mean ages of two groups of respondents those who reported that they believed that computers and technology give them more control and those that reported less control. Group N Mean Standard Deviation More 74 54.42 19.65 Less 29 54.34 18.57 A. Write the null and alternative hypothesis B. What is the significance level? C. Solve for z value D. Write the decision rule E. Accept or Reject: Be Very Specific what you plan to do and why. 2. The dean at a large university in California wonders if students at the university study less than the 1961 national average of 24 hours per week. She randomly selects 35 student and asks their average study time per week in hours. From their responses she calculates a sample mean of 16.37 hours and a sample standard deviation of 7.22 hours. At the 5% significance level what can you conclude? A. Write the null and alternative hypothesis B. What is the significance level? C. Solve for z value D. Write the decision rule E. Accept or Reject: Be Very Specific what you plan to do and why. 3. An economist claims that average weekly food expenditure of household in City 1 is more than that of household in City 2. She surveys 35 households in City 1 and obtains an average weekly food expenditure of $164.00. A sample of 30 households in City 2 yields an average weekly food expenditure of $159. Historical data reveals that the population standard deviation for City 1 and City 2 are $12.50 and $9.25 respectively. At the 5% significance level is the economist claim supported by the data? A. Write the null and alternative hypothesis B. What is the significance level? C. Solve for z value D. Write the decision rule E. Accept or Reject: Be Very Specific what you plan to do and why. 4. Huggers Polls contend that an agent conducts a mean of 53 in-depth home survey’s every week. A streamlined survey form has been introduced and Hugger want to evaluate its effectives. The number of in-depth surveys conducted during a week by a random sample of agents are: 53 57 50 55 58 54 60 52 59 62 60 60 51 59 56 At the .05 significance level can we conclude that the mean number of interviews conducted by their agents is more than 53 per week? A. Write the null and alternative hypothesis B. What is the significance level? C. Solve for z value D. Write the decision rule E. Accept or Reject: Be Very Specific what you plan to do and why. 5. For a recent year the mean fare to fly from Charlotte North Carolina to Seattle Washington on a discount ticket was $267. A random sample of round-trip discount fares on this route last month gives:.mcgraw-hill.com/sites/dl/premium/0077327047/student/data_file_icon.jpg” src=”file:///C:/Users/Pals/AppData/Local/Temp/OICE_9B5A2B54-6AD5-4BC8-815F-065246CE1FCA.0/msohtmlclip1/01/clip_image001.jpg”> .mcgraw-hill.com/sites/dl/premium/0077327047/student/lin01803_tb1024.jpg” src=”file:///C:/Users/Pals/AppData/Local/Temp/OICE_9B5A2B54-6AD5-4BC8-815F-065246CE1FCA.0/msohtmlclip1/01/clip_image002.jpg”> At the .01 significance level can we conclude that the mean fare has increased? A. Write the null and alternative hypothesis 267 B. What is the significance level? .01 C. Solve for z value D. Write the decision rule E. Accept or Reject: Be Very Specific what you plan to do and why.
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