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Question: You note that your officer is happy on 60% of your calls so you assign a probability of his being happy on your visits as 0.6. You have noticed also that if he is happy, he acceedes to ur request wid a probab. of 0.4,whereas if he is not happy he acceedes to d request wid a probab of 0.1. You call one day & he acceedes to ur request. What is d prob. of his being happy?
At = .05, does the Atlanta sample support the conclusion that above-average rates exist for this private water system? Can you conclude that above-average rates exist for this private water system?
Laura wanted to build a multiple regression model based on advertising expenditures and coffee times price index. Based on the selection of all normal values she obtained the following:
Community policing strategies have been useful in some jurisdictions to reduce crime. As Police Captain, you wish to run an experiment to see whether it will work in your city.
Given that the price-to-earnings ratios are uniformly distributed, answer the following questions. What percent of price-to-earnings ratios are between 1.90 and 2.48?
Find the expected GPA when SAT = 800. Find E (GPA|SAT = 1,400). Comment on the difference.
What is a nonparametric procedure? Describe specifically when you would utilize a nonparametric test. Under what conditions should you use the Wilcoxon sum rank test?
What different types of variables are used in quantitative studies? Describe each type of variable and how they differ.
The mean body mass index (BMI) for boys age 12 is 23.6. an investigator wants to test if the BMI is higher in boys age 12 living in new york city.
Is the Euro fair? Soon after the Euro was introduced as currency in Europe, it was widely reported that someone had spun a Euro coin 250 times and gotten heads 140 times. We wish to test a hypothesis about the fairness of spinning the coin.
What is the value of z score required for a 70% confidence interval?
Exponential distribution witha a mean value of 4 minutes. What is the probability that you will be served in less than three minutes on 4 of the next 6 days.
Compute the autocorrelations of the income series for the first 10 time lags. Is the behavior of the autocorrelations consistent with your choice in part b?
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