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Test the validity of the equal-variance assumption for the data presented in given problem.
ProblemMark 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?
What is the component of the Canadian tax system that you are studying? Provide a one-page printout from one of your ECONLIT searches
Construction of confidence interval for difference between first and second sample mean revealed interval to be 10 plus or minus 12. We conclude.
1. What fate did Troy Leon Gregg face after the Supreme Court's decision in his case? 2. Under the Georgia statute, what would be one example of an aggravating circumstance? 3. Why is the Gregg case important in the history of the Supreme Court?
A Statistic professsor plans classes so carefully that the lenths of her classes are uniformly distributed between 46.0 and 56.0 minutes. Find the probability that a given class runs less than 51.5 minutes. Find the probability of selecting a clas..
Determine the probability that exactly 11 cars approach this toll booth in the minute from noon to 1 min past noon.
question your company sells exercise clothing and equipment on the internet. to design the clothing you collect data
A recent survey by the insurance company showed the following probabilities for the number of bedrooms in each insured home. Find the standard deviation for the distribution.
Describe a situation in which correlation analysis or regression analysis can be (or was) misused to explain cause and effect relationship in a case of fortuitous correlation.
The final grades for the 5 students from teaching method 2 are 98, 93, 70, 68, 62. Two sample independent t test at alpha of .05 assuming equal variances.
the density function of the time z in minutes between calls to an electrical supply store is given byfz 110e-z
in an effort to determine whether any correlation exists between the price of stocks of airlines an analyst sampled six
suppose that x1 x2 x3 x4 and x5 is a random sample from a distribution with density function fx1theta for 0ltxlttheta.
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