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A local company wants to evaluate their quality of service by surveying their customers. Their budget limits the number of surveys to 97. What is their maximum error of the estimated mean quality for a 92% level of confidence and an estimated standard deviation of 8?
What is the null hypothesis? What is your decision if a = 0.01?
For a study that consists of personal interviews with participants (rather than mail or phone surveys), explain why simple random sampling might be less practical than some other sampling methods.
Based on the information, what decision should the director make about the books used for the courses if the goal is to keep the cost below $300?
These can have a large impact on tenure and promotion decisions at many institutions. One particular instructor had ratings in 3 courses in one semester as given by the table below for the statement "The instructor is an excellent teacher.
What is the appropriate inferential statistical test for the case scenario? Why?
If a student guesses on each question, what is the probability that the student will pass the test?
According to Fortune, Missouri is within 500 miles of 44% of all U.S. manufacturing plants 8. If a Missouri company needs parts manufactured in 122 different plants, what is the probability that at least half of them can be found within 500 miles ..
Given that a particular student tests negative for stress, what is the probability that the test results are correct, and that this student is not overstressed?
Determine the mean and the standard deviation of the sample.
Supposing a linear relationship, use the least squares method to find the regression coefficients b 0 and b 1 .
Compute and interpret each of the statistics in parts(a) through (f) Mean and Median.
Make a point estimate and a 95% confidence interval estimate.
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