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Professor Economises has 184 students in her introductory economics class. Suppose that the scores on the final exam in this class are normally distributed with a mean of 74 points and a standard deviation of 9 points. Convert the distribution to a standard normal distribution and express your answer to the nearest number of students scoring from 83 to 92. Show your work and explain
A report states that 46% of home owners had a vegetable garden. How large a sample is needed to estimate the true proportion of home owners who have vegetable gardens to within 3% with 96% confidence?
In calculating the UCR rape rates in New York City, which of the following would appear to be the best data for the denominator?
F (x) : 2. Find mean , variance 2; and standard deviation Of continuous r.v. Let X equal weight of a randomly selected quarter-pounder in pounds. What is P (0:20
Also include information about the number of participants you would assess and how you would go about estimating effect size and statistical power (when relevant).
a particular variety of watermelon weighs on average 23.8 pounds with a standard deviation of 1.35 pounds. consider the
Suppose that we generate a random sample from a given distribution. If it is desired that the probability that the sample mean will be within 2 standard deviations of the mean of the distribution is at least .99, how large should the sample size b..
If he calls on four potential clients, what is the probability that he makes exactly 3 sales? What is the probability that he makes exactly 4 sales?
bob wishes to insure a priceless family heirloom against theft. the annual premium for policy a is 150 and it will pay
a bank with branches in a large metropolitan area is considering opening its offices on saturday but it is uncertain
the sample mean x bar is the maximum likelihood estimator of sigma if the underlying p.d.f is fxsigma 1sigmae-xsigma
The profit from selling food at an outdoor cafe depends on the number of hours of sunshine through the formula, Profit = 1000(1-(e -x /10)). Find the expected level of profit.
What is the z a/2 for a confidence level of 95%, the margin error of this sample and give a 95% confidence interval for the mean weight of boxes produced based on the sample mean of 16.4?
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