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A. Two researchers make a test concerning standardized exam performance among senior high school students in one of two local communities. Researcher A tests performance from the population in the northern community, where the standard deviation of test scores is 110 ( ); Researcher B tests performance from the population in the southern community, where the standard deviation of test scores is 60 ( ). All other things being equal, which researcher has more power to detect an effect? Explain.
B. Explain how your answer to question 3 is related to standard error. Hint: You need to refer to the formula for computing standard error in order to answer this question.
For the actual percentage defective varying from 6% to 10% and ß varying from 8% to 12%, tabulate the minimum sample size required.
An accounting professor wants to know if students perform the same on the departmental final exam irrespective of the accounting section they attend.
Clients of public defenders have fewer plea bargains compared to clients of court-appointed attorneys.
Suppose the Brownian motion process is constrained by barriers. That is, we wish to generate a process Y(t) such that -b ≤ Y(t) ≤ b for a constant b > 0. Build a simulation of this system. Estimate P[Y(t) = b]
Based on the sample findings, estimate the true mean of Saturday sales with 90% probability.
A regression was carried out aimed at assessing the effect of the offer price of an initial public offering (IPO) on the chances of failure of the firm issuing.
The desired percentage of silicon dioxide in a certain type of cement is 5. A random sample of 36 specimens gave a sample average percentage of 5.21 and a sample standard deviation
How large a sample is needed to estimate the true proportion of home owners who have vegetable gardens to within 5% with 98% confidence?
Assume that p = .70 actually is the population proportion that would experience a decrease in blood pressure. What are the numerical values of the mean.
Summer Time, Inc. is considering a new 3-year project that requires an initial fixed asset investment of 3.9 million.
explain some of the differences between the method of distribution functions the transformation method for finding the
A box contains 8 tickets. Tow are marked 1, two marked 2, marked 3, and tow marked 4. Tickets are drawn at random from the box without replacement.
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