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If the correlation coefficient is 0.79, what is the explained variation
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explain it because i need to understand for a exam....
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the number of cups off coffee sold in a cafeteria during luch is discrete or continuous variable?
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A salesperson has to sell a minimum of 50 cars to earn the sales bonus. To date this month he/she has sold 42 cars. Today the salesperson has appointments with 9 prospective customers. He estimates that he/she has a 45% chance of success with each customer. What is the probability that he/she...
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Candidate Q is announced as ahead of the race by 49% with a plus or minus margin of error of 2 percentage points. The other candidate, Candidate Z, was shown to have 47% of the survey results with the same margin for error. In another survey taken the same day in a different location, Candidate...
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The following table shows the federal debt for the years 1980 through 1991. Federal Debt Year (in trillions) 1980 0.909 1981 0.994 1982 1.1 1983 1.4 1984 1.6...
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what is p-value
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In a survey of 1250 people it was found that 733 favor increased federal regulation of the financial sector. 7. The setup of the null and alternative hypotheses to test whether there is sufficient evidence to conclude that a majority of people (i.e., more than 50%) favor increased regulation is:...
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A moving company claims that 95% of its customers are happy with its service. Suspecting that it is less, a consumer group surveys 400 customers of the company and finds that 30 of them are actually not happy about the service. Find the p-value for the above mentioned test. (a) 0.0110 (b)...
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A travel agent suggests that since the law of averages makes it highly unlikely to have two plane crashes within a few weeks of each other, flying soon after a crash is the safest time. What do you think?
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