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Question: RELIABILITY OF MEDICAL TESTS. Suppose 20% of the people who were referred to a clinic for the test did in fact have the disease. If the test administered to an individual from this group is positive, what is the probability that the person actually has the disease?
Some students planned a get together, the budget for food was $500.00. Five of the students failed to come because of the distance ad therefore the cost of food for each member increased by $5.00.
Customers arrive at a queue according to a Poisson process with an average arrival rate of 4 per hour. (a) Find the probability of exactly three arrivals in 1 hour. (b) Find the probability of at least three arrivals in 2 hours.
Construct a hypothetical 95% confidence interval for a hypothetical case
an industrial hygienist want to be able to estimate the level of carbon monoxide in a plant at the a 0.01 level.
The mean amount of a purchase at the Smith Hardware store is $23.50 with standard deviation of $5.00. The amounts purchased follow normal distribution.
Expand the above table to show the change in Ms A's investment portfolio over the year, and construct a suitable diagram to illustrate that information.
Determine the least-squares regression line.- Determine the standard error of estimate.- Construct the 95% confidence interval for the mean of y when x = 7.0.
For a population with a mean of 60 and a standard deviation of 24, find the z-score corresponding to each of the following samples. What is Om for each equation?
A ratings service would like to know, within 5 percentage points and with 95% confidence, the percentage of these households who tune in to the first episode of a network miniseries. How many television households must be included in the sample?
Historical data suggests a standard deviation in the first sample of 10 and a standard deviation in the second sample of 16. Find a 95% confidence interval for the population difference.
1. (The Excel file BASE.XLS, found on the CD that came with your Berk and Carey text, has average career batting averages for 263 major league baseball players at the start of the 1988 season. a. Calculate descriptive data statistics (e.g., mean, ..
The article "Human Lateralization from Head to Foot: Sex-Related Factors" (Science, 1978: 1291-1292) reports for both a sample of right-handed men and a sample of right-handed women the number of individuals whose feet were the same size, had a bi..
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