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Dogs are being trained to detect lung cancer by smelling the breath of patients. 1286 patientswith known cancer status are tested. 708 patients without cancer were given a negative result,and 4 patients without cancer were given a positive result. 10 patients with cancer were givena negative result, and 564 patients with cancer were given a positive result.
(a) Create a table to organize the above information and help solve the problems below.
(b) Find the probability of a positive test for a patient with cancer (the sensitivity).
(c) Find the probability of a negative test for a patient without cancer (the specificity).
(d) Find the probability of having cancer for a patient getting a positive result (the positivepredictive value) for this test on this sample.
(e) Assume that the sensitivity and specificity are always the same. Find the positive predictivevalue of this test when used on a population where 7% of people have lung cancer.
The standard for this material requires that impact strength must be greater than 1.0ft-lb/in. The sample average and standard deviation obtained were 1.25 and 0.25 respectively.
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using a binomial table find the binomial probabilities px associated with given n ratio and x. a. n6 ratio 0.10 p4 b.
q1. the internal auditing staff of a local manufacturing company performs a sample audit each quarter to estimate the
What information would we need to test the claim that the difference in monthly benefits between the two groups is greater than $30 at the 0.05 level of significance? Write out the hypotheses and explain the testing procedure.
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Call centers typically have high turnover. The director of human resources for a large bank has compiled data on about 70 former employees at one of the bank's call centers in the Excel file Call Center Data.
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You are going to play mini golf. A ball machine that contains 20 green golf balls, 20 red golf balls, 22 blue golf balls, and 25 yellow golf balls, randomly gives you your ball. What is the probability that you end up with a yellow golf ball?
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