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A civil service exam yields scores which are normally distributed with a mean of 81 and standard deviation of 5.5. If the civil service wishes to set a cut off score on the exam so that 15% of test takers fail the exam, what should the cut off score be? Remember round your Z-value 2 decimal places.
1. given the sample mean is 34020 the sample standard deviation is 2200 n 32 determine the 90 confidence interval
If test results over long period of time illustrate that 5% of x values are over 2.1 pounds and 5% are under 1.9 pounds, determine mean and standard deviation for population of products produced with this process?
the mean gas mileage for a hybrid car is 56 miles per gallon. suppose that the gasoline mileage is approximately
a pair of fair six-sided dice are tossed independently of each other.a list the sample space of this experiment.b
When formulating the conclusion to the test, why is the phrase fail to reject the null hypothesis more accurate than the phrase accept the null hypothesis?
What type of educational background do CEOs have? In one survey, 344 CEOs of medium and large companies were asked whether they had an MBA degree. There were 97 MBAs
the u.s. post office is interested in estimating the mean weight of packages shipped using the overnight service. they
Match the linear correlation coefficient to the scatter diagram. The scales on the x- and y- axes are the same for each scatter diagram.
Let X be the number obtained on the blue die minus the number obtained on the red die. Draw a histogram for its probability function and a graph for its distribution function.
How do you use these three levels in relationship to evaluate risk to patients in implementing the decisions based on research findings?
an internal revenue oversight board survey found that 82 of taxpayers said that it was very important for the internal
A researcher studies the average distance that 130 people who are living in U.S. urban areas walk each week: What is the size of the sample? Identify the population.
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