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The Quick Wash 24-hour Laundromat has 16 washing machines. A machine breaks down every 20 days (exponentially distributed). The repair service with which the Laundromat contracts takes an average of 1 day to repair a machine (exponentially distributed). A washing machine averages $5 per hour in revenue. The Laundromat is considering a new repair service that guarantees repairs in 0.50 day, but it charges $10 more per hour than the current repair service. Should the Laundromat switch to the new repair service?
STAT9702 Statistical Methods for Engineering and Science Assignment. What were the investigators' aims and objectives? If they are not stated explicitly in the paper, what do you think they were? What is an appropriate target/reference population for..
What is the probability Mary and Ellen make a total number of free throws at least as great as the total made by the guys?
12.6% are age 65 and over. Approximately what percentage of the population are working age adults (above age 17 to age 65)?
Modify the regular one-sample Wilcoxon W by replacing the ranks 1, 2, 3, 4, 5, 6, 7, 8 by the scores 1, 1, 2, 2, 2, 2, 3, 3, to obtain W1. Compute the mean and variance of W1.
a random sample of size 81 is to be selected from a population that has a mean of 95 and a standard deviation of 15.a.
When n = 2, how many distinct knapsack sets are there? Write them out in a canonical form with integral coefficients and 1 = [EQUATION4].
a brand of television has a lifetime that is normally distributed with a mean of 7 years and a standard deviation of
Based on this information, how much should your client pay for this business?
A certain airplane has two independent alternators to provide electrical power. The probability that a given alternator will fail on a 1-hour flight is .02. What is the probability that (a) both will fail? (b) Neither will fail? (c) One or the oth..
Assume the variance is known to be 0.49. Is there evidence at the 0.05 level that the valve performs above the speci?cations?
A researcher wishes to estimate, with 95% confidence, the population proportion of adults who say chocolate is their favorite ice cream flavor. Her estimate must be accurate within 3% of the population proportion.
The National Center for Health Statistics reported the data below, showing the percentage of all births that are to unmarried women for selected years between 1980 and 1998.- Create a model that describes this trend. Justify decisions you make abou..
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