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At one university, students are given z-scores at the end of the semester rather than the traditional GPAs. The mean and standard deviation of all students’ cumulative GPAs, on which the z-scores are based, are 2.7 and 0.5 respectively.
c. The president of the university wishes to graduate the top16% of the students with cum laude honors and the top 2.5% with summa cum laude honors. Where (approximately) should the limits be set in terms of z-scores? In terms of GPAs? What assumption, if any, did you make about the distribution of the GPAs at the university?
In the North American court system, a defendant is assumed innocent until proven guilty. In an ideal world, we would expect that the truly innocent will always go free, whereas the truly guilty ones will always be convicted.
Need to get quiz done online goodness of fit and test for independence need to get over 80%
Create one table that calculates summary measures of the change in test scores and income variables across all 80 schools.
Assume then money spent is uniformly distributed between these amounts. Determine the mean amount spent on insurance?
What is the probability that a randomly selected grapefruit will have a diameter of at least 4.14 inches?
If random samples, each with n = 4 scores, are selected from a normal population with MK = 80 and o=10
Medical studies have shown that 10 out of 100 adults have heart disease. When a person with heart disease is given an EKG test, a 0.9 probability exists that the test will indicate the presence of heart disease.
A psychologist is studying the distribution of IQ scores of girls at an alternative high school. In wishing to estimate the average IQ scores in this school.
Of 146 adults selected randomly from one town, 31 of them smoke. Construct a 99% confidence interval for the true percentage of all adults in the town that smoke.
In the history class the mean score was 76 with standard deviation 3.
What is your opinion: Does this study provide evidence that the postmortem serotonin levels are different between patients who die of heart disease and patients who die of other causes?
Suppose that a random requisition is found to have been incorrectly entered. What is the probability that it was processed by data entry specialist 3?
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