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Polls showed the two main candidates in 2004 presidential election were nearly tied on the day before the election. To predict the winner a newspaper would like to have a poll that has a margin of error of less than 1%. Roughly how large a sample would be needed for such a poll?
The random variable x is known to be uniformly distributed between 70 and 90. The probability of x having a value between 80 to 95 is
It is suspected that the mean turnover has changed and is not 6.0. Use the .05 significance level. State the decision rule.
What control limits should be applied to his sample?
Find the probability of exactly 6 Mexican-Americans among 12 jurors.
Compute standard error of mean? Compute the margin of error, with 95% confidence.
Suppose you know that the distribution of sample proportions of nonresidents in samples of 200 students is normal with a mean of 0.04 and a standard deviation of 0.03.
Find the value of sample covariance in linear regression model
Determine the probability of having more than 3 defects in a roll?
Using the simple test of independence (described in the lecture), decide if the events high calorie and high fiber are independent or dependent. Show your work.
Utilizing Excel data analysis calculate t distribution also deduce the result. Study of variance is used to investigate if there is a difference in the mean mileage of the three cars.
Can it be concluded that, X, number of boys in two-child families of preeminent scholars, is binomiallydistributed? Let α=0.05.
Estimate the population mean
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