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According to Student Monitor, a New Jersey research firm, the average cumulated college student loan debt for a graduating senior is $25,760. Assume that the standard deviation of such student loan debt is $5,684. Thirty percent of these graduating seniors owe more than what amount?
Evaluate the difference in the mean ratings and find the standard deviation of the difference in the ratings, what is the chance both children are boys?
q1. a small town has a population of 20000 people. among these 1000 regularly visit a popular local bar. a sample of
In1990, 5.8% ofjob applicants whowere testedfor drugsfailed thetest.
Fit a linear regression model for bp against sodium. Do you think this is a model with a good fit? Why?
Prof Hardtack gave three exams last semester in a large lecture class. The standard deviation = 7 was the same on all three exams, and scores were normally distributed.
Joe is being audited by the IRS and must provide an estimate for his investment earnings over the next four years. After a thorough search, Joe can only find the following records.
People with type O-negative blood are universal donors. That is, any patient can receive a transfusion of O-negative blood. Only 7% of the American population have O-negative blood.
Finding the probability value for the given data using normal approximation
The data comes from a set of scores on a 50 point Bilogy 101 test. 90 subjects took the test. The scores range from 12-50. How to make a simple frequency distribution table, using the raw data?
The firm examined 35 randomly chosen fax transmissions during the next year, yielding a sample mean of 14.44 with a standard deviation of 4.45 pages.
At the .05 significance level, can the developer conclude there is a difference in the mean income? Use the five-step hypothesis testing procedure.
Suppose you study a random sample of 100 GRE verbal exams. Consider your a sketch of the sampling distribution of sample means and the appropriate calculation model.
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