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On a recent prostate cancer screening test, Bobo received positive results. It is known that this type screening test will show 99 percent positive for people who have cancer and 1 percent positive if the person dies not have cancer. Suppose that about 0.1 percent of people who take the test actually have cancer. What is the probability that Bobo actually has cancer?
Using an appropriate hypothesis test, at a 5% level of significance, can you conclude that there is any difference between the average value between houses that have a fireplace (Fireplace = 1) and houses that don’t have a fireplace (Fireplace = 0)?
a contractor is considering a sale that promises a profit of 20000 with a probability of 0.7 or loss of 7000 with a
a real estate company wants to study the relationship between house sales prices and some important predictors of sales
What is the probability of a fatal accident over a lifetime? Explain your reasoning carefully. Hint: Assume independent events. Why might the assumption of independence be violated?
A company has 25 cars of this model. What is the probability that the mean nitrogen oxide emissions of these cars is above the 0.3g/mi limit?
If you want to be 95% confident of estimating the population proportion to within a sample error of +and - .05 and there is historical evidence that the population is approximately .35, what sample size is needed.
let b and c be independent random variables uniformly distributed over 07 and 03 respectively. what is the probability
in boston record game fishes it is stated that in the cozumel region approximately 40 of strikes while trolling result
A random sample of 20 single men was asked if they would welcome a woman taking the initiative in asking for a date. What is the probability that
A normal population has a mean of 75 and a standard deviation of 5. You select a sample of 40. Compute the probability that the sample mean is Between 74 and 76.
On a test whose distribution is approximately normal with a mean of 50 and a standard deviation of 10, the results for three students were reported as follows:
records indicate that on average 3.2 breakdowns per day occur on an urban highway during the morning rush hour.
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