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The 2009 GRE has 200 questions with 3 possible answers and only one of which is correct. For a candidate who guesses at all answers, find the mean and variance for the random variable X, the number of correct answers.
This exercise is a "what if analysis" designed to determine what happens to the test statistics and interval estimates when elements of the statistical inference change.
Use the value of the linear correlation coeffient of determinatiom. what does this tell you about the explained variation of the data about the regression line?
A standard deviation of 60 seconds. Find the probability that a randomly selected boy in secondary school can run the mile in less than 322 seconds.
A battery manufacturing plant normally operates two eight-hour shifts per day and 6 days per week. The manufacturer can produce 375 units per hour.
This model is fit to the data using the method of least squares using statistical software, and the following ANOVA table is obtained
We suggest that you use the graphical approach to CVP analysis to solve the following problem, but you may use any other method to find the answer.
There are 10 questions on a true-false test. A student feels unprepared for this test and randomly guesses the answer for each of these.
A researcher conductued a study of the access speed of 35 hard drives and concluded that his maximum error of estimate was 35. If he were to conduct a second study to reduce the maximum error of estimate to 7, about how many hard drives should he ..
Compute the indicated confidence interval for the differenciate in proportions. Suppose that the samples are independent and that they have been randomly selected.
In a transportation problem with 5 supply points, 3 demand points, and total supply equaling total demand, the number of decision variables will be:
In a sample of 1,000 representing a survey from the entire population, 650 people were from Laketown, and the rest of the people were from River City.
Determine the minimum sample size required in order for you to be confident that your evaluate is within of? Use value for population standard deviation of scores on this subsection.
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