Posted by **Rebecca** on Tuesday, October 30, 2007 at 4:00pm.

In 1990, the average annual Medicare spending per enrollee was $3267; in 2003, the average annual Medicare spending per enrollee was $6883. Supposed you hired a consulting firm to take a sample of fifty 2003 Medicare emrollees to further investigate the nature of expenditures. Assume the population standard deviation for 2003 was $2000.

A. Show the sampling distribution of the mean amount of Medicare spending for a sample of fifty 2003 enrollees.

B. What is the probability the sample mean will be within +-$300 of the population means?

C. What is the probability the sample mean will be greater that $7500. If the consulting firm tells you the sample mean for the Medicare enrollees they interviewed was $7500, would you question whether they followed correct simple random sampling procedures.

- Statistics -
**tom**, Monday, November 14, 2011 at 2:29pm
12

## Answer this Question

## Related Questions

- statistics - A researcher wants to study the spending habits of customers of a ...
- health care - If an enrollee uses more services thatn originally assumed per the...
- Health insurance - Please check my answer thanks for the help :) If an enrollee ...
- Health insurance - Please check my answer thanks :) Ifan enrollee uses more ...
- Statistics - The average annual salary of employees at Wintertime Sports was $28...
- Statistics - According to a study several years ago by the Personal ...
- Government US - Which of the following is true of social security and Medicare? ...
- math - After its fastest rate of growth ever during the 1980s and 1990s, the ...
- Calc - After its fastest rate of growth ever during the 1980s and 1990s, the ...
- Calculus - After its fastest rate of growth ever during the 1980s and 1990s, the...