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One professor teaches a large section, section A, of a particular class, and on the first test of the term, the test scores in section A were approximately normally distributed with a mean of 78 and a standard deviation of 6. Another professor also teaches a large section, section B, of the same class, and on the first test of the term, the test scores in section B were also approximately normally distributed with a mean of 74 and a standard deviation of 10.
Two students, one from each section, earned a grade of 92 on the exam. The student from section B claims that he did better because the section B test, with a mean of 74, was obviously more difficult than the section A test with a mean of 78. However, the student from section A claims that because she has a higher z-score, she actually performed "better." Calculate the z-scores for each student's test grade and settle their dispute; that is, decide who had the superior performance on this test.
Determine the mean and the standard deviation of the sample.
A defective picture tube was discovered in the latest shipment. What is the probability that it came from Tyson Wholesale?
Under proposed plan, how long, on average, will patient stay in ER? On average, how long will Potential Admit stay in ER?
Give an example of a hypothesis test. State what the Null and the Alternative hypotheses.
Calculate (a) MAD, (b) MSE, and (c) MAPE for the following forecast versus actual sales figures.
Given the following revenue and cost function for a business firm, calculate the break-even quantity, total revenue, total cost and total profit at break-even level of production.
What are the endpoints of a 95 percent confidence interval for the proportion defective. (Round your answers to 3 decimal places).
Hours worked is important predictor of amount of sales.
Suppose there are two samples of size 6 and 7, with a rank sum of 58 in the sample of size 6. Using the Wilcoxon rank sum test, evaluate the significance of the results, assuming there are no ties.
Findout the value of X using normal distribution which gives standard deviation also mean. A math teacher gives two different tests to measure students' aptitude for math.
During the past year, the mean sales of Wshington Reds in cases was 45,000 cases, and the standard deviaiton was 4,450. How many cases of Washington Reds should be brought to market? Assume the sales follow a normal distribution.
Colleges typically use grade point average cutoffs to decide who graduates with honors and who is accepted into certain programs (such as teacher education, for example).
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