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You decide to conduct a survey of a sample of 25 members of this year's graduating class and find that the average GPA is 3.2. The standard deviation of the sample is 0.4. Over the last ten years, the average GPA has been 3.0. Is this year's class significantly different from the long-run average? At what alpha level would it be significant?
Frequent checks of unfilled orders at end of day reveal that distribution of unfilled orders follows Poisson distribution with mean of two orders. Sketch the histogram representing Poisson probability distribution of unfilled orders.
Either no change to the Objective function or a raise in the value of the objective function depends on the constraint.
Computing the mean and standard errors of sampling distribution - Using the central limit theorem, find the means and standard errors of sampling distributions
Why is cumulative relative frequency distribution so much more informative that just relative frequency distribution? Use examples to explain these differences.
In the sample of 80 students, 9 were found to be overweight. At a= 0.01, is there adequate evidence to reject claim using critical values?
The production department wants to explore the relationship between the number of employees who assemble a subassembly and the number produced. The complete set of paired observations follows:
According to the Insurance Institute of America, a family of four spends between $400 and $3800 per year on all types of insurance. Suppose the money spent is uniformly distributed between these amounts.
Use a 0.05 significance level to test the claim that these credit rating are from a population with a mean that is equal to 700.
A sample of n= 16 scores has a mean of M = 45 and SS = 960. Calculate the sample standard deviation (s) and the estimated standard error for the sample means (SM).
The MBA department is concerned that dual degree students may be receiving lower grades than the regular MBA students. Two independent random samples have been selected.
Explain the difference between the null hypothesis and the alternate hypothesis. How is the null hypothesis chosen (why is it null)? What is the importance of rejecting the null hypothesis, can we make a geneeral staement about the population base..
If you were to roll a single die 10 times, the result of each roll would be __________. A) Mutually exclusive of the other nine rolls B) Proportional to the other nine rolls C) Dependent upon the other nine rolls D) Independent of the other nine roll..
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