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A company studying the productivity of their employees on a new information system was interested in determining if the age (x) of data entry operators influenced the number of completed entries made per hour (y) the regression equation is y=14.374 - 0.145. if s = 14.04 and s(y) = 2.61 then the correlation coefficient between age and productivity is
If 350 respondents out of a random sample of 1,000 Americans reported that they did not trust their government, what is your estimation at a 99% confidence level of the proportion of the American population who do not trust their government?
a researcher conducted a study on the effects of stress on migraines. the researcher computed the number of migraines
Use each decision criterion (maximin, maximax, minimax regret, expected value) to determine the price that Pizza King should charge.
a club with 20 members must choose a three-person executive committee and a five-person social committee.a how many
There are infinitely many prime numbers p of the form 4n+3. In other words, show that there exist infinitely many positive integers, n, such that the number 4n+1 is prime.
What is the event corresponding to the above system failing during one period of operation and what is the event corresponding to the above system functioning properly during one period of operation?
A biologist estimates that 50% of deer in the region carry a certain type of tick. for a sample of 300 deer selected at random, what is the chance that 155 or fewer deer have this tick?
Is P(K + 1) = P(K)(365-K)/365 and, If so, why? Find the smallest class size K for which the probability that two or more students have the same birthday exceeds 0.5.
To conduct a follow-up study that would provide 95% confidence that the point estimate is correct to within plus-or-minus 0.04 of the population proportion, how large a sample size is required?
A) census bureau data show that the mean household income in the area served by a shopping mall is $62,500 per year. A market research firm questions shoppers at the mall to find out whether the mean household income of mall shoppers is higher..
Develop a regression model to fit the trend effects for the data. Use a linear model and then try a quadratic model and how well does either model fit the data?
consider the first order model equation in 3 quantitives independent variablese y 1 2x1 x2 -3x3a graph the relationship
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