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Results of a screening test of 780 subjects are given in the table below. Disease No Disease Totals Positive Screen 352 15 367 Negative Screen 23 390 413 Totals 375 405 780 Suppose 10% of a population has this disease.
Calculate and interpret the positive predictive value (PPV) of this screening test.
If air resistance is proportional to the square of the instantaneous velocity, then the velocity v of a mass m dropped from a given height is determined from:
Describe and interpret the results (including the coefficients). Include the linear regression equations. How do the R values in linear regression relate to the correlation coefficient in the case of age and height?
HR Consulting surveyed a random sample of 74 Twin Cities construction companies to find information on the costs of their health care plans. One of the items being tracked is the annual deductible that employees must pay.
a. Construct a simple price index for item Y using Year 0 as the base year. b. Determine the simple aggregate price index using Year 0 as the base year.
If the total fraternity/sorority membership is 300 people, how many members should be included in the sample? Use (and explain) your own estimate for the population standard deviation.
A normal distributed population has a mean of 250 pounds and a standard deviation of 10 pounds. Given n = 20, what is the probability that this sample will have a mean value between 245 and 255 pounds?
in a certain city the daily consumption of electric power in millions of kilowatt-hours is a random variable x having a
Use Bayes' rule to find conditional probability which Julianne is carrier, given that she and Jason have one child who doesn't have CF.
In a test of the independence of two variables, one the variables has two possible categories and the other has three possible categories.
A clinical trial is being planned to investigate the effect of a new experimental drug designed to reduce total serum cholesterol. Investigators will enroll participants with total cholesterol levels between 200-240, they will be randomized to re..
Find the probability that a task from user 1 is executed for the first time during the 4th slot. Given that exactly 5 out of the first 10 slots were idle, find the probability that the 6th idle slot is 12.
what do they mean? with confidence interval? im just starting out and this is part of our homework for class. i dont
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