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A person scores 81 on a test of verbal ability and 6.4 on a test of quantitative ability. For the verbal ability test, the mean for people in general is 50 and the standard deviation is 20. For the quantitative ability test, the mean for people in general is 0 and the standard deviation is 5. Which is this person's stronger ability: verbal or quantitative? Explain your answer to a person who has never had a course in statistics.
You manufacture and sell an iron rod whose electrical conductivity is supposed to be 10.1. You plan to make 6 measurements of the conductivity of a rod you plan to sell.
Frequently, tests tha yeild abnormal results are repeated for confirmation. What is the probability that for a normal person a test will be at least 1.5 times as high as the upper limit of normal on two seperate occasions.
In a sample of 900 U.S. adults, 208 dine out at a restaurant more than once per week. Two U.S. adults are selected at random from the population of all U.S. adults without replacement. Assuming the sample is representative of all U.S. adults.
A survey of 34 students at the Wall College of Business showed the following majors: What is the probability he or she is a management major?
Calculate the correlation coefficient for the given data? Interpretation of the correlation coefficient?
Suppose 4 of those arrested are first-time offenders. Is there any evidence to suggest that the proportion of first-time offenders arrested for DUI in Illinois has changed? Justify your answer.
Consider the problem of minimizing c/x over a polyhedron P. Prove the following: (a) A feasible solution x is optimal if and only if c' d ;::: 0 for every feasible direction d at x. (b) A feasible solution x is the unique optimal solution if and o..
Assume grades in college accounting class are normally distributed with a mean of 82 and a standard deviation of 7. what is the probability that a randomly selected student from this class will have a grade lower than 65?
An understanding of statistics is necessary for any job. The use of statistics can help provide answers to many questions. Please, post a question you think that statistics may help you answer and explain why statistics can contribute to providin..
In a one-tail test involving a sample mean, the p-Value is found to be equal to 0.10. If the test had been two-tail instead of one-tail, the p-Value would have been
If one or the other has to be right, what probabilities would we assign to their claims if it were found that 11 of 12 newly hired teachers stayed with the school for more than a year?
What percentage of employees at the Bureau process fewer forms than Michael? What percentage of employees at the Bureau process more forms than Michael?
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