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Uppose that the mean of the annual return stocks
Customer Question
uppose that the mean of the annual return for common stocks from 2000 to 2012 was 14.37%, and the standard deviation of the annual return was 35.14%. Suppose also that during the same 12year time span, the mean of the annual return for longterm government bonds was .6%, and the standard deviation was 2.1%. The distribution of annual returns for both common stocks and longterm government bonds are bellshaped and approximately symmetric in this scenario. Assume that these distributions are distributed as normal random variables with the means and standard deviations given previously.
Confidence Interval Estimation
2. Compute a 95% confidence interval for the population mean, based on the following sample: 1.5, 1.54, 1.55, 1.51, 0.09, 0.08, 1.55, 0.07, 0.99, 0.98, 1.12, 1.13, 1.00, 1.56, and 1.53. Change the last number from 1.53 to 50 and recalculate the confidence interval. Using the results, describe the effect of an outlier or extreme value on the confidence interval.
Hint: A confidence interval and a confidence level are NOT the same thing. (A confidence interval should have lower and upper limits, and I want you provide them both.)
Hypothesis Testing
3. The management of the Ceebler Fairy Corporation is considering relocating the corporate office to a new location outside HisWood Forest. Management is concerned that the commute times of the employees to the new office might be too long. The company decides to survey a sample of employees at other companies in the same office forest to see how long these employees are commuting to the office. A sample of 23 employees indicated that the employees are commuting X (bar) = 33 minutes and s = 1 minute, 45 seconds.
a. Using the 0.01 level of significance, is there evidence that the population mean is above 32 minutes?
b. What is your answer in Part A if instead X (bar) = 37 minutes and s = 27 minutes?
c. Look at your answers for a and b above and discuss what you can learn from the results about the effect of a large standard deviation.
. Peter’s new IT Help Company is concerned that the mean wait time of their phone customers for a customer service agent is not greater than 15 minutes. It can be assumed that the population variance is 9 minutes 6 seconds based on past experience. A sample of 563 customers is selected and the sample mean is 16 minutes 30 seconds. Using a level of significance of .10, is there evidence that the population mean wait time is greater than 15 minutes? Fully explain your answer.
Find the probability that the return for common stocks will be greater than 16.32%.
Find the probability that the return for common stocks will be greater than 5.89%.
Find the probability that the return for common stocks will be less than 14.37%.
Submitted:
1 year ago.
Category:
Multiple Problems
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Expert:
Mr. Gregory White
replied 1 year ago.
Hello, my name is Greg.
I see this might be time sensitive.
Do you still need this answered?
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Customer:
replied 1 year ago.
yes, I am having difficulties with this assignment
Expert:
Mr. Gregory White
replied 1 year ago.
After going through my resources, I do not have what is necessary to complete at this time.
I am opting out and opening up to the other professionals and messaging a couple who might be able to help.
Someone should be with you shortly.
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Expert:
F. Naz
replied 1 year ago.
What isw your deadilne, thanks
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