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A student estimates that the probability of his passing math or english is 0.9, the probability of his passing english is 0.8, but the probability of his passing both is 0.6. What should be his estimate of the probability of his passing math?
Why can not we just do several two sample tests like we did in the last week. In your own words explain briefly also tell us what these are and what did it mean.
As part of a study of corporate employees, the Director of Human Resources for PNC, Inc. wants to compare the distance traveled to work by employees at their office in downtown Cincinnati with the distance for those in downtown Pittsburgh.
At 95% level of confidence, can we conclude that the babies using the Gibbs product gained less weight?
Given the same significance level, a ________ value of t will be required to reject the null hypothesis compared to the value of z required for rejection.
Compute descriptive statistics for each stock and the S&P 500. Comment on your results. Which stocks are the most volatile? Compute the value of beta for each stock. Which of these stocks would you expect to perform best in an up market? Which..
Are the following statements a valid pair of null and alternative hypothesis?
In a class of 40, 16 driver a car made outside the United States. What is the confidence interval for the total population of students at the 95% level?
Assume that 12 percent of adults in this country have filed for bankruptcy at some point in their life.
A machine fills containers with a mean weight per container of 16oz. If no more than 5% of the containers are to weigh less than 15.8oz, what must the standard deviation of weights equal?
What the degree of freedom tells us? What are the degree of freedom for t- test, X^2-test, and for F-twst?
The trial failed to show significance. How many subjects would be required to detect the difference in proportions observed in the trial with 80% power?
Assuming that the Poisson distribution is a plausible model in describing variability of asbestos fiber counts in filters; derive a 95% confidence interval indicating the variability in the average number in asbestos fibers.
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