Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Question: Test the validity of the equal-variance assumption for the data presented in problem 8-25.
Problem: Mark Pollard, financial consultant for Merrill Lynch, Pierce, Fenner & Smith, Inc., is quoted in national advertisements for Merrill Lynch as saying: "I've made more money for clients by saying no than by saying yes." Suppose that Pollard allowed you access to his files so that you could conduct a statistical test of the correctness of his statement. Suppose further that you gathered a random sample of 25 clients to whom Pollard said yes when presented with their investment proposals, and you found that the clients' average gain on investments was 12% and the standard deviation was 2.5%. Suppose you gathered another sample of 25 clients to whom Pollard said no when asked about possible investments; the clients were then offered other investments, which they consequently made. For this sample, you found that the average return was 13.5% and the standard deviation was 1%. Test Pollard's claim at α = 0.05. What assumptions are you making in this problem?
The standard deviation is believed to be 0.25%. Find a bound such that the probability that the actual rate obtained will be this number or below it is 90%.
(a) Show that this second probability statement can be written as Pr (nS2/b tr nS2/a) = 0.95. (b) If n = 9 and s2 = 7.63, find a 95 percent confidence interval for u2.
Two independent random samples of 25 waiting times in each of the counters gives s1 = 2.5 minutes and s2 = 3.1 minutes. Carry out the test of equality of variances, using α = 0.02.
What is the probability and Determine a 99% confidence interval estimate of the mean mileage.
The following class intervals for a frequency distribution were developed to provide information regarding the starting salaries for students graduating from a particular school:
Derive a conservative one-sided upper 95% confidence interval for θ if x=4 is observed.
A random sample of 25 tablets of buffered aspirin contains, on average 325.05 mg of aspirin per tablet, with a standard deviation of 0.5 mg.
Where does the p-value come from for the spatial scan statistic used in SaTScan? Explain how Monte Carlo simulation is used to derive a p-value for a cluster.
The branch manager conducted an audit to determine if there is any kind of strong relationship between the number of staff absent and the average time that the customer had to stand in the queues inside the bank.
The following is a random sample of the wealth, in billions of U.S. dollars, of individuals listed on the Forbes "Billionaires" list for 2007.- Construct a 90% confidence interval for the average wealth in $ billions for the people on the Forbes li..
three points are chosen at random on a circle of unit circumfrence. what is the probability that the triangle defined
The port of Trop can service only 1 ship at a time. However, there is mooring space for 3 more ships. Trop is a favorite port of call, but, if no mooring space is available the ships have to go to the next port.
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd