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A system has two components that operate in parallel. At least one of the components must function properly if the system is to function properly. The probabilities of failures for the components 1 and 2 during one period of operation are .15 and .07 respectively, and the component failures are independent. What is the probability that the system functions properly during one period of operation?
A university investigation was conducted to determine whether women and men complete medical school in significantly different amounts of time, on the average. Two independent random samples were selected and the following summary information conc..
If a group of 81 children is selected at random, what is the probability that the average time these children watch television is more than 3.5 hours a day?
Two people are playing a game. Only one dice is thrown. If the outcome is a 2 or a 3, then player 1 pays player 2 $6. How much should player 2 pay player 1 when a 1, 4, 5 or 6 is thrown so that player 1 and 2 break even
What is logistic regression? How is it different from ordinary linear regression? How is it similar to ordinary linear regression?
Prepare a bar graph that displays the number of patients by age of diagnosis. Prepare a pie chart that displays the number of patients by race. Prepare a table that displays the numbers of patients by sexual orientation.
an accounting firm has been hired by a large computer company to test whether the proportion of accounts receivables
Find the probability that (i) the student took mathematics or history; (ii) the student does not take either of these subjects.
based on our past history of winning bids on projects the probability of winning the next contract to build a school is
Suppose the likelihood that any flight on Northwest Airlines arrives within 15 minutes of scheduled time is .90. We choose four flights from yesterday for study.
A study reported on 6 patients with chronic myofascial pain syndrome. The mean duration of pain had been 3 years for the 6 patients and the standard deviation had been 0.5 year. provide a numerical value of chosen test and p-value. Based on the obt..
A promotion campaign is being planned to encourage people to reduce heat in their houses at night. In order to measure the campaign's impact, we want to determine the proportion of people who reduce their heat at night.
For reservation purposes, the agency's management wants to ?nd the number of people such that the probability is 0.85 that at least that many people will sign up. It also needs 0.80 probability bounds on the number of people who will sign up for t..
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