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Calculate the estimate for the standard error of difference between two independent means for s12 = 13, s22 = 20, n1 = 22, and n2 = 30. (Give your answer correct to two decimal places.)
raising your grade. suppose you have scores of 60706585 and 85 on exams in a sociology class.a. what is the mean of
for the following hypothesis test ho u lt 45 ha u gt 45 alpha 0.02. with n 80 ? 9 and 47.1 state the calculated
Quality control engineer has been checking output by almost continuous sampling as abnormal condition began. Determine the probability that in sample of 10 pieces.
If you had a sample size of 50 and did not know the standard deviation of the population, would you use a t or a z statistics in your analysis? Why?
a computer chip manufacturer rejects 6 percent of the chips produced because they fail to work properly when tested.
Normal distribution with a mean of 8.1 minutes and a standard deviation of 1.9 minutes. For a randomly received emergency call, find the following probabilities. The response time is between 5 and 10 minutes
Suppose that 40% of cars in your area are manufactured in the United States, 30% in Japan, 10% in Germany, and 20% in other countries. If you randomly select 6 cars, what is the probability that two of them are Japanese?
A state representative is reported as saying that about 10% of reported auto thefts involve owners whose cars have not really been stolen, but who are trying to defraud their insurance company.
Following sample data shows the weekly closing price of ABC stock. Compute the sample mean and variance from this data set.
In terms of p , the researcher should test which of the following null and alternative hypotheses?
How to convert a exam score (standard score) back to Percent score? e.g. Total of students 16,
Suppose the budget has the support of 52% of the voters. What is the probability that the newspaper's sample will lead it to predict defeat?
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