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A class has 2n (a large number) students The students are separated into two groups A and B each with n students. Group A students take exam A and earn iid scores X1,..., Xn. Group B students take exam B, earning iid scores Y1,..., Yn. The two exams are similar but different; however, the exams were designed so that a student's score X on exam A or Y on exam B have the same mean and variance σ2 = 100. For each exam, we form the sample mean statistic
Based on the statistic D = MA - MB, use the central limit theorem to design a significance test at significance level α = 0.05 for the hypothesis H0 that a students score on the two exams has the same mean µ and variance σ2 = 100. What is the rejection region if n = 100? Make sure to specify any additional assumptions that you need to make; however, try to make as few additional assumptions as possible
The average patient should pay no more than $250 out-of-pocket? State your hypotheses and decision rule. (b) Is this a close decision?
Assume there are 18 homes in the Quail Creek area and 9 of them have a security system. Five homes are selected at random: what is the probability all five of the selected homes have a security system?
A sample of 3000 observations has a mean of 82 and a standard deviation of 16. Using the empirical rule, find what percentage of the observations fall in the intervals , and x+/- 1s, x+/- 2s x+/- 3s.
a dividend is a payment from a publicly traded company to its shareholders. the dividend yield of a stock is determined
Prepare a frequency distribution table for these data using single-valued classes - Compute the relative frequency and percentage distributions.
forecasting forecasting impacts so many parts of business. nbspit is used to set budgets allocated resources plan for
If campaign can be expected to also to rise the probability of best case scenario to 0.4, is it a good investment.
question a researcher conducted and experiment on the effects of a new drug on depression. the researcher had a
according to a recent survey about 33 of americans polled said that they would likely purchase reusable cloth bags for
Diastolic blood pressure (DBP) values were measured for 150 patients using two medical devices. The mean DBP values using the two devices are 120 and 122 respectively. Also the standard deviation of the difference of the measurements is 0.634. Te..
This problem has to do with graphical plotting and computation for certain distribution. Please mention a detailed response to the questions listed with appropriate graphical and statistical data representation(s).
an index of two store items for 2007 based on 2004 is to be constructed. the information for the prices and quantities
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