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If we were randomly drawing a sample of one organizaiton from a population of 15, where five are "high performers" and seven are "low performers", how many possible draws are there?
How is the rejection region defined and how is that related to the z-score and the p value? When do you reject or fail to reject the null hypothesis?
for a given sample size when we increase the probability of type 1 error the probability of a type 2 error?a. remains
a shipment of 20 cameras include 3 that are defectivegt what is the minimum number of cameras that must be selected
The researcher wanted to investigate the influence of diet, specifically the role of saturated fat in the diet, on the development of a myocardial infarction (heart attack). What is the sample and population in this study?
Calculate the control limits for a c chart when Ubar = 3.0%, n = 60, and you collect one sample per hour for 40 hours of production. (2 sets of control limits required, x bar and range)
Given the following frequency distribution, find out the mean, variance, and standard deviation.
A continuous random variable, x, is normally distributed with a mean of $1000 and a standard deviation of $100. Convert each of the following x values into its corresponding z-score.
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%.
They answered in 230 seconds per call with a standard deviation of $40. Can the company claim that they are faster than the average utility?
For some positive value of Z, the probability that a standard normal variable is between 0 and Z is 0.3770. Find value of Z? For some value of Z, the probability that a standard normal variable is below Z is 0.2090. Find value of Z?
the following information is collected from students upon exiting the campus bookstore during the first week of
Finds that their mean travel time is = 22.5 minutes. What are the null and alternative hypotheses for testing whether the true mean is different from 20 minutes?
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