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The city park benches are 16.7 inches high. The mean distance from the bottom of the shoe to the back of the knee is 18.1 inches for women. The standard deviation is 0.70 inch.
What proportion of the women who use the bench will have their feet dangle (unless they sit forward on the bench)?
For each statement compute the z statistics and the associated P-value for the comparisons between the two groups. For these calculations you can assume that the standard deviation of the difference is .08, so z is simply the difference in means
Following are measurements of tensile strength in ksi (x) and Brinell hardness (y) for 10 specimens of cold drawn copper. Assume that tensile strength and Brinell hardness follow a bivariate normal distribution.
suppose you are conducting a study with a total of 50 participants from five different regions of the country and you
If the proposed textbook receives a favorable review, how should the editor revise the probabilities of the various outcomes to take this information into account?
The restaurant's manager says the discounts vary with an average of $10.00 and a standard deviation of $15. How much more can you expect to save at the Wise Fool?with what standard deviation?
A couple both carry a recessive gene for albinism, meaning the probability of any child being albino is ¼. The couple plans to have 4 children. What is the probability that two of their four children will be albino? Calculate the expected mean and ex..
The times that a cashier spends processing each person's transaction are independent and identically distributed random variables with a mean of 1.5 minutes and standard deviation of 1 minute.
What is the probability that a home has a garage but not a swimming pool?
These data are presented below. Should the manager be given an increase in staff? Why or why not? Please show your work.
Use the traditional method to test the given hypothesis. Assume that the population is the normally distributed and that the sample has been randomly selected.
The following is from an article titled "After the Workout, Got Chocolate Milk?" that appeared in the Chicago Tribune (January 18, 2005): Researchers at Indiana University at Bloomington have found that chocolate milk effectively helps athletes re..
Why would it be important to determine if the researchers assigned the women participating in the study at random to one of the two groups? Explain why you think that the researchers included a control group in this study.
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