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Probability
(Single Best Answer) Question 1: A diagnostic test for a particular disease has a sensitivity of 0.90 and a specificity of 0.90. A single test is applied to each suject in the population in which the diseased population is 10 %. What is the probability that a person positive to this test, has the disease ?
A) 90 %
B) 81 %
C) 50 %
D) 91 %
Answer (Select an option above to get the answer):
(Single Best Answer) Question 2: After applying a statistical test, an investigator gets the 'p value' as 0.01. It means that ?
A) The probability of finding a significant difference is 1%
B) The probability of declaring a significant difference, when there is truly no difference, is 1%
C) The difference is not significant 1% times and significant 99% times
D) The power of the test used is 99%
Answer (Select an option above to get the answer):
(Single Best Answer) Question 3: The events A and B are mutually exclusive, so ?
A) Prob (A or B) = Prob (A) + Prob (B)
B) Prob (A and B) = Prob (A).Prob (B)
C) Prob (A) = Prob (B)
D) Prob (A) + Prob (B) = 1
Answer (Select an option above to get the answer):
(Single Best Answer) Question 4: After applying a statistical test, an investigator gets the 'p value' as 0.01. It means that ?
A) The probability of finding a significant difference is 1%
B) The probability of declaring a significant difference, when there is truly no difference, is 1%
C) The difference is not significant 1% times and significant 99% times
D) The power of the test used is 99%
Answer (Select an option above to get the answer):
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