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According to Money, which not only looked at stocks (as in problem 7-20) but also compared them with real estate, the average appreciation for all real estate sold in the five years ending May 2007 was 12.4% per year.
To test this claim, an analyst looks at a random sample of 100 real estate deals in the period in question and finds a sample mean of 14.1% and a sample standard deviation of 2.6%. Conduct a twotailed test using the 0.05 level of significance.
Using a significance level of 0.05, perform a hypothesis test to see if the workers are right, and you need to hire more help. Write your hypotheses, calculate your test statistic and decide whether or not to reject your null.
(Proof of a Weaker Version of the Duality Theorem) Show that if the primal problem is feasible and the intervals Xij are compact, then the optimal primal and dual costs are equal (even though the dual problem may not have an optimal solution)
A random sample of 85 group leaders and supervisors revealed that they worked an average of 6.5 years before being promoted. The population standard deviation was 1.7 years. Using the 0.95 degree of confidence, what is the confidence interval for ..
a 90 confidence interval estimate for a population mean was computed to be 49.3 67.9. determine the mean of the sample
Formulate a spreadsheet model for performing a computer simulation of the daily sales. Perform 250 replications and obtain the average of the sales over the replications.
200 students took a test. The scores were normally distributed. Your score was in the 60th percentile. How many people scored at or below your score?
Assume that p-value was 0.07, would you reject null hypothesis of equal mean rates for a Type- I error rate of 5%? (Circle one).
suppose for each student in a large statistics class you record how far shehe sits from the teacher during a
normal distribution if the mean per capita income in the u.s. is 39000 and the standard deviation is 5000 - what
Two points are chosen uniformly and independently on the perimeter of a circle of radius 1. This divides the perimeter into two pieces. Determine the expected value of the length of the shorter piece.
(a) Determine the test statistic. Show all work; writing the correct test statistic, without supporting work, will receive no credit.(b) Determine the P-value for this test. Show all work; writing the correct P-value, without supporting work, wi..
questiona soft drink manufacturer is using a winning cap as a sales promotion. the purchaser can get a prize if they
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