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It is estimated that 3% of the athletes competing in a large tournament are users of an illegal drug to enhance performance. The test for this drug is 90% accurate. What is the probability that an athlete who tests positive is actually a user?
.2177
.7823
.10885
.4354
Use Excel and the data to test whether the mean alcohol expenditures for UCM students is equal to that of SBU students using a 1 % level of significance.
What is the probability that the team wins tonight and that there will be a large crowd at tomorrow's game?
Compare among expected monetary approach also expected utility approach. Sketch the brokers utility curve and describe what it says about her risk profile.
Compute fraction of the employees cost between $1,500 and $2,000 per year? Evaluate percent that didn't have any dental expense.
We want to know if his support has decreased. In computing a test of hypothesis with , what is the estimate of the overall proportion?
Now we would like to evaluate regression equation for X using Y as independent variable.
A researcher determines that 42.7% of all downtown office buildings have ventilation problems. Is this a statistic or a parameter; explain your answer.
A math course has 2 sections. Section one has 55 students of which 10 received an A. Section two has 45 students of which 11 received an A. If a student was chosen randomly from 100 students
Jared bets on the number 7 for each of 100 spins of a roulette wheel. Because P(7) = 1/38 he expects to win two or three times. What is the probability that Jared will actually win two or more times?
Is there sufficient evidence for one to claim that in general, rugby players have a higher BMI than the multisport men? Perform the test at the 0.01 level of significance.
Sketch the areas under the standard normal curve over the indicated intervals, and find the specified areas.
Could you explain the Pearson or product-moment correlation? If we were to use a partial correlation, would you want to look at the relationship between two variables while removing the effect of one or two other variables?
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