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Assume the random variable X is normally distributed with mean u=50 and standard deviation o=7. Compute P(X>37) = ?
At 99% confidence, test to determine if there is sufficient evidence to indicate that process 2 takes a significantly longer time to manufacture the Zip drives.
Using the results, describe the effect of an outlier or extreme value on the confidence interval.
In a large section of statistics class, the points for the final exams are normally distributed with a mean of 72 and a standard deviation of 9. Find the lowest score on the final exam that would qualify a student for an (A, B, C, D)
Suppose you are working with a data set that is normally distributed, with a mean of 300 and a standard deviation of 44. Determine the value of x from the following information.
The standard deviation of the sample was 1.7 years. Using the 0.95 degree of confidence, what is the confidence interval within which the population mean lies?
question five thousand randomly-selected mba graduates were surveyed to determine their future plans. the survey
you are testing whether there is a significant difference in the proportions of college students and similar aged non college students having accidents during the two year period. What is the value of your pooled proportion?
A random sample of 100 students who took a statistics exam were asked their score on the exam. The mean score on the test was 50; the standard deviation was 10. The scores are normally distributed.
an electronics store sells an average of 60 entertainment systems per month at an average of 800 more than the cost
The BATF wants to evaluate true average lead level for California wines to within 29 parts per billion at 95% level of confidence?
why the rise in performance on IQ tests contrasts with a steady decline in performance over the past decades on many standardized tests,
a bleary-eyed student awakens on morning late for an 800 class and pulls two socks out of a drawer that contains two
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