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Suppose an unrelated 77-year-old man, 76-year-old woman, and 82-year-old woman are selected from a community.
(a) What is the probability that all three of these individuals have Alzheimer's disease?
(b) What is the probability that at least one of the three people has Alzheimer's disease?
(c) Suppose we know one of the three people has Alzheimer's disease, but we don't know which one. What is the conditional probability that the affected person is a woman? The Chinese Mini-Mental Status Test (CMMS) consists of 114 items intended to identify people with Alzheimer's disease and senile dementia among people in China. An extensive clinical evaluation of this instrument was performed, whereby participants were interviewed by psychiatrists and nurses and a definitive diagnosis of dementia was made. The results obtained for the subgroup of people with at least some formal education. Suppose a cutoff value of = 20 on the test is used to identify people with dementia.
(a) What is the sensitivity of the test?
(b) What is the specificity of the test?
Assuming we can verify that the data set is approximately normally distributed, what percentage of times will the server be down less than 24 minutes?
Given the following number of hours between breakdowns for 4 machines, are the machines significantly different? If so, how are they different? Which machine is the best? Which machine is the worst?
Consequently, the consultants decide to test the null hypothesis ? ? 0 H : 33.7 . What is the value of the test statistic for testing this null hypothesis?
Describe the Linear programming problem with constraints. Which among the following is not acceptable as a constraint in a linear programming problem?
You play a game with two possible outcomes. Outcome A has probability 0.4 and outcome B has probability 0.6. When B occurs you win $2.00; otherwise, you lose $1.00. What is your expected value for this game?
consider the following experiment a ball is drawn without replacement from an urn containing two red and three blue
Find the least squares regression line by deciding which are the appropriate independent and dependent variables and calculating the equation of the line. State equation of line.
instructionsyour comments should add significantly to the discussion by suggesting alternative solutions pointing out
high levels of cholesterol in the blood increase the risk of heart disease. for 14-year-old boys the distribution of
daily demand for newspapers for the last 10 days has been as follows 12 13 16 15 12 18 14 12 13 15. forecast sales for
What is the probability that no requests for assistance are in the system? What is the average number of requests that will be waiting for service? What is the average waiting time in minutes before service begins?
What about these descriptive statistics makes you wary or uncomfortable? In other words, if you were a real estate agent, would you go around spouting the answers that you gave above? Explain.
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