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The times between component failures in a certain system are exponentially distributed with a mean of 4 hours. What is the probability that at least one component failure occurs within a 30-minute period?
1. if a population mean is 300 and the sample mean is 400 the difference of 100 is calleda.standard errorb.sampling
a survey provided the estimate that the mean number of hours of television viewing per household is 7.25 hours per day.
STAT 200: Introduction to Statistics - How many degrees of freedom are there - Find the area to the right of the TEST STATISTIC
Assuming that there is no other evidence, what is the probability that the driver arrested by the police is innocent of the robbery?
a survey of 35 randomly selected iphone owners showed that the purchase price has a mean of 432 with a sample standard
Using one mean t test to determine whether or not to support the claim - hypothesis test that WORKS THE SAME as the z-test
Penultimate Support Systems makes fairly good speaker and equipment support stands for music groups. The assembly process involves two operations
Recalling that the coefficient of variation is determined by the ratio of the standard deviation over the mean, compute the coefficient of variation.
Auditor wants to be within 7% of true proportion when using 95% confidence level. How many files should auditor sample?
Under what circumstances should a nonparametric test be used? Explain. What are the strengths and weaknesses of nonparametric tests?
For reservation purposes, the agency's management wants to find the number of people such that the probability is 0.85 that at least that many people will sign up.
Dr. Hernandez wants to examine the impact of caffeine on test performance. She randomly assigns the 60 students in her class to three groups.
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