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A project has the following cash flows. What is the internal rate of return? Year 0 1 2 3 Cash flow -$121,000 68,150 $42,200 $39,100 14.39% 13.47% 14.82% 12.71% 13.85%
Suppose the service time, in minutes, at a bank has the Exponential distribution with lambda = 1/2. Use the central limit theorem to estimate the probability that the average service time of the fir
A piggy bank contains one penny, one nickel, one dime, and one quarter. It is shaken until two coins fall out at random. What is the probability that at least $0.30 fall out?
An experimenter has prepared a drug dosge level that she claims will induce sleep for 80% of the people suffering from insomnia. After examining the dosage, we feel that her claim regarding the effe
Can this company be accused of paying substandard wages? Use alpha = 0.01 level test. Calculate the p-value. Does it suggest the same as your HT?
Three sides of a die are painted red, 2 sides yellow, and 1 side blue. What is the probability that when this die is thrown, the face that comes up is not red?
A study of residents of a region showed 20% were smokers. The probability of death due to lung cancer, given that a person smoked, was ten times the probability of death due to lung cancer, given th
In one season of 30 basketball games, what would you expect is the longest streak of consecutive shots made for a 40% shooter who shoots on average 20 shots per game? (Assume that the "Hot Hand" doe
Peggy has drawn two cards from a standard dock and obtained an Ace of clubs and a King of clubs. If Peggy draws three more cards, in how many selection can Peggy get
If there are 50 nurses in a nursing home, how would you randomly select 10 of them to participate in your study? Please be descriptive in your answer
Raw scores on behavioral tests are often transformed for easier comparison. A test of reading ability has mean 69 and standard deviation 8 when given to third graders. Sixth graders have mean score
For which of the following variables would cumulative percentages be readily interpretable? Number of adults in a household
Derive De Moivre's result log(Q/M)=-(2t^2)/n or equivalently log(M/Q)=(2t^2)/n.(Hint: Divide the arguments of the first two logarithm terms in the expression in the text by m. Then simplify and repl
Which is preferable as a graphical display for a large, quantitative data set: a histogram or a stem-and-leaf diagram? Explain your answer.
Find the cdf and pdf for the product of U and V. (The first will require computaion of a double integral over an appropriate (u,v) region.)
A pressure tranducer outputs 0.28 Volts at 2.4 psi and 4.82 Volts at 28.67 psi. Assuming the pressure transducer is highly linear, perform a two pont calibration using the two given data points. Wha
Assume the random variable has a binomial distribution with the given probability of obtaining a success.
Find the mean, median, and mode for the set of scores in the following frequency distribution table. (Round to 1 decimal place):
In a binomial experiment the probability of success is 0.06. What is the probability of at most two successes in seven trials?
Kasandra Associates provides executive coaching services to Fortune 100 senior executives. Her team charges $190 per hour to provide coaching when firms prepay for 20 sessions. The following table s
A crossover trial is planned to evaluate the impact of an educational intervention program to reduce alcohol consumption in patients determined to be at risk for alcohol problems.
Report the p-value of the test. Perform the test using a significance level a = .05. Use graphical methods to present the two populations of interest.
The metal body for a spark plug is made by a combination of cold extrusion and machining. The occurrence of surface cracking following the extrusion process has been shown by Pareto diagrams to be