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Find the confidence interval for variance and standard deviation.
Find the 90% confidence interval for the variance and standard deviation for the time it takes a state police inspector to check a truck for safety if a sample of 27 trucks has a standard deviation of 6.8 minutes. Assume the variable is normally distributed.
If die is loaded so that 6 comes up with probability 0.2 and probabilities of 2,3,4, and 5 faces are not affected, determine the assignment of probabilities to the six faces?
Conduct the following test using 95% level of confidence.
Florida State University administers a test of mathematics placement to students when they first enter the university.
Determine the distribution of X? Determine its parameters?
If a lot is known to contain 10% defective items, find out the probability that lot will be rejected? Accepted?
Determine the coefficient of determination R 2 . Determine standard error of the estimate s e .
Calculate a 92% confidence interval for the mean density of quartz porphyry, given that 75 samples yield mean of 2.62 grams per cubic centimeter
The Minneapolis Tribune ran an article on gender differences in shopping behavior. When 400 women were asked to respond to the question "Where I shop is influenced by which store has a greater variety," 60% answered "Yes.
The mean of a normal probability distribution is 60; the standard deviation is 5.
What fraction of the calls last between 4.2 and 5 minutes?
Find the probability of failure of system for any 4 hours of operation?
A company makes molded plastic toys. They study the plastic injection process into the molds. A common cause of variation and What are the control limits for an chart
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