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A study was done to evaluate the diagnostic value of dyspnea (being out of breath) following exertion for congestive heart failure (CHF). The results are tabulated below.
CHF no CHF Dyspnea 41 183 no Dyspnea 0 35
a. Estimate the sensitivity of Dyspnea as a test for CHF.
b. Estimate the specificity of Dyspnea as a test for CHF.
If one of the 1200 pacemakers is randomly selected and is found to be defective, what is the probability that it was manufactured in Atlanta?
For the leading health maintenance organization (HMO) firms,
A summary of data (deposits in thousands of dollars) from the survey is as follows: First National 1 = 4.1, σ1 = 1.2; City National 2 = 3.5, σ2 = 0.9. Use a 98% confidence interval to estimate the difference in the mean weekly deposits into IRAs f..
A standard deviation of 2.5lb. What is the largest annual per capita consumption of ice cream that can be in the bottom 15%?
When making a CI for a mean, by what factor must you increase the sample size in order to cut the margin of error in half?
What fraction of American males weigh more than 225 pounds? - How much do I weigh? - If I weighed 20 pounds more than I do, what percentile would I be in?
Suppose the value of the test statistic is z = 2.08. What is the p-value?
the demand for a product of carolina industries varies greatly from month to month.based on the past two years of data
You are well in a year into the Covid-19 time, now. What is the ideal working condition for a sales in dairy products?
it has been recorded that 10 people get killed by shark attack every year. what is the probability of having 5 or 6
The mean construction time for a standard two-car garage by Arrowhead Construction Company is 3.5 days. The time for the construction process follows the normal distribution.
a sociologist wishes to determine whether there is a relationship between the sex of a person and the amount of alcohol
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