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"Crime Finds the Never Married" is the conclusion drawn in an article from USA Today (June 29, 2001). This conclusion is based on data from the Justice Department's National Crime Victimization Survey, which estimated the number of violent crimes per 1000 people, 12 years of age or older, to be 51 for the never married, 42 for the divorced or separated, 13 for married individuals, and 8 for the widowed. Does being single cause an increased risk of violent crime? Describe a potential confounding variable that illustrates why it is unreasonable to conclude that a change in marital status causes a change in crime risk.
Produce a printout of the frequency tables, showing the total of both frequencies.
Five children under twelve are selected at random. The probability that the average number of hours that they spend each week watching television is at least 30 is about?
A shipment of crankshafts is believed to be defective. A simple random sample of 16 is drawn from a large shipment. Check to see if the sample is any different from the assumed population mean of 224.
a study was performed to investigate the relationship betwee family income and ownership of a luxury car. 16 households
What is the probability that a consumer selected at random: a. purchased fewer products than before? b. purchased the same number of products as before?
Have your program repeat this experiment a number of times to estimate the expected number of selections necessary in order that the sum of the chosen numbers first exceeds 1. On the basis of your experiments, what is your estimate for this number..
Run a regression of Q on P (a) testing only for a shift in the intercept during periods of strike and nonstrike and (b) testing for a shift in the intercept and slope.
iven an infinite population with a mean of 75 and a standard deviation of 12, the probability that the mean of a sample of 36 observations taken at random from this population exceeds 78 is?
in a recent study 32 convicts were given a course in great works of literature. to be accepted for the program the
If an auction house is selling products to risk neutral buyers, which of the types of auction would you recommend? If you are a potential buyer, what might your strategy be? Support your answers using economic analysis learned in this course.
Use the normal distribution to approximate the following probability: According to the most recent Davenport student profile, 47% of students have children under 17 living at home with them.
the heights of all female college basketball players in the ncaa are normally distributed with a mean of 68 inches and
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