SYM 506 Week 4 Assignment Help

SYM 506 Week 4 Assignment Help | Grand Canyon University 

Complete the problems below from the textbook. You will need to use the "Lincolnville School District Bus Data" and the "Century National Bank Data" files for this assignment.

1.    Chapter 8 – Problem 44

2.    Chapter 8 – Problem 48

3.    Chapter 9 – Problem 56

Families USA, a monthly magazine that discusses issues related to health and health costs, surveyed 20 of its subscribers. It found that the annual health insurance premi-ums for a family with coverage through an employer averaged $10,979. The standard deviation of the sample was $1,000.

 a. Based on this sample information, develop a 90% confidence interval for the popula-tion mean yearly premium.

b. How large a sample is needed to find the population mean within $250 at 99% confidence?

4.    Chapter 9 – Problem 66

Near the time of an election, a cable news service performs an opinion poll of 1,000 prob-able voters. It shows that the Republican contender has an advantage of 52% to 48%.

 a. Develop a 95% confidence interval for the proportion favoring the Republican candidate.

 b. Estimate the probability that the Democratic candidate is actually leading.

c. Repeat the above analysis based on a sample of 3,000 probable voters.

5.    Chapter 9 – Problem 71

Refer to the Lincolnville School District bus data.      

a. Develop a 95% confidence interval for the mean bus maintenance cost.    

 b. Develop a 95% confidence interval for the mean bus odometer miles.    

 c. Write a business memo to the state transportation official to report your results.

6.    Chapter 9 Case A – Century National Bank

Century National Bank

  Refer to the description of Century National Bank at the   end of the Review of Chapters 1–4 on page 129. When Mr.   Selig took over as president of Century several years ago,   the use of debit cards was just beginning. He would like an   update on the use of these cards. Develop a 95% confidence interval for the proportion of customers using these   cards. On the basis of the confidence interval, is it reasonable to conclude that more than half of the customers use   a debit card? Write a brief report interpreting the results.   

For problems requiring computations, please ensure that your Excel file includes the associated cell computations and/or statistics output. This information is needed in order to receive full credit on these problems.

Submit output in one Excel file.

You are not required to submit this assignment to LopesWrite.