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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 variance of firm's profit for the month.
Estimate using three day weighted moving average. Estimate sales for the next day using a three-day weighted moving average where the weights
Do these simulated data provide evidence for us to conclude that a difference in the spinal canal cross sectional area exist between the population of subjects with disc hernination and a population of those who do not have disc hernation?
Four different types of fertilizers are used on raspberry plants. The number of raspberries on each randomly selected plaint is given below.
Simulate a completely random process of length 48 with independent, t-distributed values each with 5 degrees of freedom. Construct the time series plot. Does it look "random" and nonnormal? Repeat this exercise several times with a new simulation ..
Using the data in the Excel file Home Market Value, develop a multiple linear regression model for estimating the market value as a function of both the age and size of the house.
The dean of a nursing school claims that the average starting salary of its graduates is more than 60 (in $000's). It is known that the population standard deviation is 10 (in $000's).
What percent of the Fords traveled 62.000 miles or less during the year?
30% of households say they would feel secure if they had $50,000 in savings. you randomly select 8 households and ask them if they would feel secure if they had $50,000 in savings. find the probability that the number that say they would feel secu..
Kolzak Appliance has just received a shipment of 10 TV sets. Shortly after they were received, the manufacturer called to report that he had inadvertently shipped 3 defective sets.
How does the MHMR compare to the state's figures on providing services to first-time admissions - Hypothesis test for one sample mean
Black Hole Pizza Parlor instructs its cooks to put a "handful" of cheese on each large pizza. A random sample of six such handfuls were weighed.
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