# Sampling Distribution Complete solutions and illus

Sampling Distribution
Complete solutions and illustrations are required.
1.The average annual salary for all U.S. teachers is \$29,863. Assume that the distribution is normal and the standard deviation is \$5,200.
a.Find the probability that a randomly selected teacher earns at least \$35,000 a year.
b.What is the probability that the mean for a sample of 80 teachers’ salaries is greater than \$30,000?

1. 👍 0
2. 👎 0
3. 👁 26

## Similar Questions

1. ### Sampling Distribution

Sampling Distribution Complete solutions and illustrations are required. 4.The average breaking strength of a certain steel cable is 2000 pounds, with a standard deviation of 100 pounds. A sample of 20 cables is selected and

asked by Tina on February 28, 2013
2. ### Statistics- quick! Is this right?

I need to verify one of my answers quickly...the problem is: The mean annual salary for classroom teachers is \$43,658. Assume a standard deviation of \$8000. 1) Determine the sampling distribution of the sample mean for a sample of

asked by Laura on November 2, 2007
3. ### Sampling Distribution

Sampling Distribution Complete solutions and illustrations are required. 2.In a study of life expectancy, it was found that the mean age at death in the Philippines was 72 with a standard deviation of 5.8 years. If a sample of 50

asked by Rhea on February 28, 2013
4. ### Statistics

An economist found that a random sample of 42 high school teachers had an average annual salary of \$56,490. A previous study showed that the population standard deviation is \$4150. Find the 99% confidence interval for µ, the

asked by Alison on December 18, 2012
5. ### Statistics

An economist found that a random sample of 42 high school teachers had an average annual salary of \$56,490. A previous study showed that the population standard deviation is \$4150. Calculate the margin of error, E, for a 99%

asked by Patrick on March 1, 2014
6. ### Sampling Distribution

Sampling Distribution Complete solutions and illustrations are required. 5.The standard deviation of a variable is 15. If a sample of 100 individuals are selected compute for a.The standard error of the mean. b.What sample size is

asked by Tina on February 28, 2013
7. ### Math (Statistic)

Considered the sampling distribution of a sample mean obtained by random sampling from an infinite population. This population has a distribution that is highly skewed toward the larger values. a) How is the mean of the sampling

asked by Jennifer on February 19, 2007
8. ### Sampling Distribution

Sampling Distribution Complete solutions and illustrations are required. 3.The mean systolic blood pressure of normal adults is 120 millimeters of mercury (mm Hg) and the standard deviation is 5.6. Assume that the variable is

asked by Dre on February 28, 2013
9. ### Statistics

The average annual salary of employees at Wintertime Sports was \$28,750 last year. This year the company opened another store. Suppose a random sample of 18 employees had an average annual salary of \$25,810 with standard deviation

asked by Jasmine on March 25, 2012
10. ### Statistics- PEASE help!

Subjects Art Business Computers English Foreign Languages Health Home Economics Mathematics Music Physical Education Science Social Studies Features Contribute Download Experts Forum Job Openings Homework Tips Libraries.Jiskha

asked by Laura on November 2, 2007

More Similar Questions