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International communications research conducted the 2004 national spring cleaning survey for the soap and detergent association. ICR questioned 1000 American male and female heads of household regarding their house cleaning attitudes. The survey has a margin of error of plus or minus 5%.
a. What is the population?b. How many people were polled?c. What information was obtained from each person?
What are the advantages and disadvantages of regression models in comparison to using a computerized regression routine? Give examples.
If X and Y are two independent Poisson random variables, then show that the conditional distribution of X given X+Y is binomial.
What is a discrete random variable and how does it differ from a continuous random variable? Give examples.
Capital punishment law is among the most complex bodies of law in the US. As a result of frequent errors, the Trial Judges Assn. has developed a special training course to try to cut down on the errors.
For each of the following, indicate whether the type of probability involved is an example of a priori probability, empirical probability, or subjective probability.
A clothing retailer wishes to investigate the relationship between order size (in dollars) and the level of satisfaction of the customer.
You own a stock called Insurate, Inc. Your profit for the stock is a random variable (W) with mean 1,000 and variance 400. You would like to buy more stock and you are trying to decide between Insurate
A recent study of 50 self-service gasoline stations in the Greater Cincinnati' Northern Kentucky metropolitan area revealed that the mean price of unleaded gas was $2.029 per gallon. The sample standard deviation was $0.03 per gallon.
Different approaches for creating systems simulation models include?
The following sample data shows the quarterly earnings in millions for two US companies. Your research interest is finding if the average earnings for these companies are different.
You are given the following data. Test the claim that there is a difference in the means of the two groups. Use = 0.01. State the null and alternate hypotheses
A local bank wants to install motion detector burglar alarms. Each has a 70% chance of detecting a burglar. If the bank wants to be 99% certain of detecting a burglar how many need to be installed?
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