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A business trip is equally likely to take 2, 3, or 4 days. After a d-day trip, the change in the traveler's weight, measured as an integer number of pounds, is uniformly distributed between -d and d pounds. For one such trip, denote the number of days by D and the change in weight by W. Find the joint PMF PD,W (d, w).
According to the U.S. Census Bureau, the mean household income in the United States in 2000 was $57,045 and the median household income was $42,148.
A random sample of 100 adult workers, 60 men and 40 women, is selected in a large Midwestern city. Of the group, 42 men and 17 women are union members.
What is the arithmetic mean income? What is the population variance? The standard deviation? The annual incomes of officers of another firm similar to TMV Industries were also studied.
An investor owns three common stocks. Each stock, independent of the others, has equally likely chances of (1) increasing in value, (2) decreasing in value, or (3) remaining the same value.
What is the probability that the first marble is orange and the second marble is not orange and what is the probability of getting a jack, again a jack and finally a ten?
Illustrate how you could use the interrupted time series design to naswer a real world research question through the use of archival data.
use your calculator or other software to conduct a test of the hypothesis that mu6 vs mult6 for the following data.
Standardized scores offers a way of comparing norm-referenced scores. The z-score distribution is based on knowing how many standard deviations away from the mean a certain score is.
We wish to determine whether the homicide rate is different in different parts of the country and, if it is different, what is the pattern. We have data on 36 states - 9 each in the four regions Northeast, Midwest, South and West.
the average flight from point a to point b takes 50 minutes with a standard deviation of 5 minutes. what is the
If the standard deviation of the process is unknown, another approach is to use the sample range as a measure of process variability. Calculate the control limits for the above process using the sample range.
Twenty percent of cars that are inspected have faulty pollution control systems. The cost of repairing a pollution control system exceeds $100 about 40% of the time.
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