6. A population consists of the following five values: 2,2,4,4 and 8.
A. List all samples of size 2 and compute the mean of each sample.
B. compute the mean of distribution of sample means and the population mean. Compare the two values.
C. Compare the dispersion in the population with that of the sample means.
10. There are five sales associates at mid-motors ford. The five representatives and the number of cars they sold last week are:
Sales. Cars Sold
Representative.
Peter Staller. 8
Connie Stallter. 6
Juan Lopez. 4
Ted Barnes. 10
Peggy Chu 6
A. How many different samples of size 2 are possible?
B. List all possible samples of size 2, and compute the mean of each sample
C. Compare the mean of the sampling distribution of sample means with that of the population
D. On a chart compare the dispersion in sample means with that of the population.
12. Scrapper elevator company has 20 sales representatives who sell its product through out the US and Canada. The number of units sold last month by each representative is listed below. Assume these sales figures to be population values.
2 3 2 3 3 4 2 4 3 2 2 7 3 4 5 3 3 3 3 5
A. Draw a graph showing the population distribution
B. compute the mean of the population
C. Select five random samples of 5 each. Compute the mean of each sample. Use the methods described the methods to be used in order to determine the items to be included in the sample.
D. Compare the mean of the sampling distribution of the sample means to the population mean. Would you expect the two values to be about the same?
E. draw a histogram of the sample means. Do you notice the difference in the shape of the distribution of sample means compared to the shape of the population distribution?
16. A normal population has a mean of 75 and a standard deviation of 5. You select a sample of 40. Compute the probability the sample mean is:
A. Less than 74
B. between 74 and 76
C. Between 76 and 77
D. Greater than 77
18. According to an IRS study it takes a mean of 330 minutes for taxpayers to prepare, copy, and electronically file a 1040 tax form. This distribution of times follows the normal distribution and the standard deviation is 80 minutes. A customer watchdog agency selects a random sample of 40 tax payers.
A. What is the standard error of the mean in this example?
B. what is the likelihood that sample mean is greater than 320 minutes?
C. What is the likelihood the sample mean is between 320 and 350 minutes?
D. What is the likelihood the sample mean is greater than 350 minutes?
Essay Writing Service Features
Our Experience
No matter how complex your assignment is, we can find the right professional for your specific task. Achiever Papers is an essay writing company that hires only the smartest minds to help you with your projects. Our expertise allows us to provide students with high-quality academic writing, editing & proofreading services.
Free Features
Free revision policy
$10Free bibliography & reference
$8Free title page
$8Free formatting
$8How Our Dissertation Writing Service Works
First, you will need to complete an order form. It's not difficult but, if anything is unclear, you may always chat with us so that we can guide you through it. On the order form, you will need to include some basic information concerning your order: subject, topic, number of pages, etc. We also encourage our clients to upload any relevant information or sources that will help.
Complete the order form
Once we have all the information and instructions that we need, we select the most suitable writer for your assignment. While everything seems to be clear, the writer, who has complete knowledge of the subject, may need clarification from you. It is at that point that you would receive a call or email from us.
Writer’s assignment
As soon as the writer has finished, it will be delivered both to the website and to your email address so that you will not miss it. If your deadline is close at hand, we will place a call to you to make sure that you receive the paper on time.
Completing the order and download