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A University Web server has five main components each with the same reliability. All five components must work for the server to function as intended. If the University wants to have a 95 percent reliability, what must be the reliability of each of the components?
We recalculated our comparison of ideal number of children, this time only for women, separating them into two groups, those who indicated that they were "very happy" or "not at all happy" with life.
What is the explained return on an equally weighted portfolio of these three stocks? What is the variance of a portfolio invested 20 percent each in A and B and 40 percent in C?
21 percent of the employees in a company have managerial positions, and 31 percent of the employees in the company have MBA degrees. Also, 66 percent of the managers have MBA degrees. Using the probability formulas, find the proportion of employee..
Compare the differences of Simple random sampling & Cluster sampling using specific examples, and show the pros and cons of each method.
A 95% confidence interval for the proportion of all adults who bought a lottery ticket in the past year is (assume Gallup used an SRS)
Suppose we select a sample of 40 tires and use a simulator to determine the tread life. What is the likelihood of finding that the sample mean is between 59,050 and 60,950?
A manager wishes to find out whether there is a relationship between the number of radio ads aired per week and the amount of sales (in thousands of dollars) of a product. The data for the sample are shown below. a) Draw the scatter plot for the v..
Katie is studying aggression among adolescent girls. She believes that there is a relationship between the level of interaction a girl has with her mother and her level of aggression.
In the following observational studies, describe changes that could be made to the data collection process that would result in an experiment rather than an observation study. Also, offer suggestions about unseen biases or lurking variables that m..
Motorola takes two weeks to supply an order. if the store manager is targeting a fill rate of 99%, what safety inventory should the store carry? What should its ROP be?
A group of 200 adults aged 21 to 50 were chosen from those entering Fit Right Health stores in Washington State, and were randomly divided in two groups.
Construct appropriate control charts for before and after introduction of the new pathway. Discuss process stability and the results.
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