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Question 1: Assume that breast cancer affects .8 percent of the female population between 40 and 50 years of age. There are two kinds of test results: true positive (you have it) and false positive (the test indicates you do have it, but you really do not). Assume Mammograms are 90% accurate at spotting people who have breast cancer (true positive), and are 93% accurate at spotting people who do not (true negative). What are the false negative and false positive accuracies? If a female tests positive for breast cancer, compute the likelihood that she indeed has the cancer.
Question 2: A pair of dice is rolled. The sum of the faces on top is observed. What are the expectation, variance, and standard deviation of the observed sum? The Expectation and Variance Template attached to the main posting is optional and recommended.
Use this information to construct a probability table, and then calculate each of the following probabilities:
Define validity and reliability. How can we insure our data is both reliable and valid? Which of these two do you think is the more important?
every home football game for the past eight years at eastern state university has been sold out. the revenues from
She knows that each order for these bills costs $300 for clerical and armored car delivery costs, and that order lead time is six days. Assuming a thirty-day month, if she were to order 6,000 bills at a time, what would be the length of an order cy..
Formulate the hypotheses that can be used to determine whether the sample data support the hypothesis that the mean fuel efficiency rating for midsize cars is greater than the mean fuel efficiency rating for large cars.
Clearly identify the independent and dependent variables you would study, including the number of levels of the independent variable.
There are three loan officers at Farmer National Bank. All decisions on mortgage loans are made by one of these officers. The president of the bank would like to be sure that the rejection rate is about the same for the three officers.
Create a contingency table for this data: In a "taste test" fourteen men showed a preference for Coke an the same number showed a preference for Pepsi.
the initial research proposal will consist of the following six 6 items1.identify a business research topic2.define the
The proportion of 25-29 year olds who are smokers is 0.032
Suppose the number of tickets written per day follows a Poisson dictribution with mean of 6.5 tickets per day. Interpret the value of the mean.
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.
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