2. An advertisement seeking volunteers for clinical research draws 11 responders
ID: 3058881 • Letter: 2
Question
2. An advertisement seeking volunteers for clinical research draws 11 responders. Of these responders 5 are below age of 30 and 6 are over 3 researcher will randomly select 4 persons (without replacement) to assign to a particular treatment regiment (a) How many selections are possible? (b) What is the probability exactly 3 of the selected 4 persons are below age 0. The 30? (c) What is the probability at least 1 of the selected 4 persons is over age 302 (d) What is the probability exactly 2 of the selected 4 persons is over age 30 and 2 of the selected 4 persons is below age 30 ?Explanation / Answer
2. An advertisement seeking volunteers for clinical research draws 11 responders. Of these responders 5 are below age of 30 and 6 are over 3 researcher will randomly select 4 persons (without replacement) to assign to a particular treatment regiment (a) How many selections are possible? (b) What is the probability exactly 3 of the selected 4 persons are below age 0. The 30? (c) What is the probability at least 1 of the selected 4 persons is over age 302 (d) What is the probability exactly 2 of the selected 4 persons is over age 30 and 2 of the selected 4 persons is below age 30 ?
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