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Statistics professor Dr. Stat claimed his pulse rate at the peak of an exercise program was lower than the mean pulse rate of statistics students. Dr. Stat's pulse rate was measured to be 60.0 bpm. His 20 students had a mean pulse rate of 74.4 bpm with a standard deviation of 10.0 bpm. What critical value you should use to test Dr. Stat's claim that statistics students have a mean pulse rate greater than 60.0 bpm at a 0.01 significance level?
If a transit employee provides a strand of hair for drug testing, state the null and alternative hypotheses in verbal terms, then identify what would constitute a Type I error and a Type II error in this situation.
a. Draw a probability tree for this situation, with the most appropriate choice for the first branch. b. Find the probability that it is a good year.
What is the null and alternate hypotheses, degrees of freedom, test statistic, rejection region, and decision.
In what interval would you expect most peoples body temperatures to be? Explain.- What fraction of people would be expected to have body temperatures above 98.6°?
In exercises describe the probability law of the random variable given.
According to the National Association of Homebuilders, the average life expectancies of a dishwasher and a garbage disposal are about the same: 10 years.
Assume that the proportions in the table represent the "infinite population" of adult women. Let A = {woman used oral contraceptives} and let B = {woman had an MI episode}- Find P(A), P(B), P(Ac), and P(Bc) and What is P(A n B)?
In the previous example, let, instead, T be the time of the last occurrence in the time interval (0, t]. If there is no occurrence during (0, t], we set T = 0. Compute E T.
If a manufacturer of colored candies states that 13?% of the candies in a bag should be? brown,14?% yellow, 13?% red, 24?% blue, 20?% orange, and 16?% green.
The agency found that 10% of the time, over 1,000 people respond immediately after a mailing, and 50% of the time, at least 650 people respond right after the mailing. Find the mean and the standard deviation of the number of people who respond fo..
A first step to answering this question would be to simulate 10 flips. Use the random number table in Appendix A to simulate flipping a coin 10 times.
The MPG (Miles per Gallon) for a mid-size car is normally distributed with a mean of 32 and a standard deviation of .8. What is the probability that the MPG for a selected mid-size car would be less than 33.2.
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