True or False 1. T_F For small populations and large samples we should use sampl

Question

True or False

1. T_F For small populations and large samples we should use sampling with replacement to get accurate results 2. If I have 2 nines in my 7 card poker hand, what is the probability that another player has no nines (dealt from a 52 card deck)? 3. TF Given two bags, one with 60 green and 40 white chips, the other with 60 white and 40 green. What is the probability that I picked from the green bag if Igot 4 out of 5 green chips, obtained by sampling with replacement? 4. TF The base rate of a phenomenon has a substantial influence on the outcome of testing for that phenomenon 5. T FAnchoring and sticking with the status quo are the same decision traps 6. T F There are an infinite number of possible outcomes for a discre te distribution 7. T-F The number of defects on a product is usually distributed binomially. 8 Three machines are connected in series. The probability of failing is 0.02 for all three machines If any one fails in processing a product, the product fails. What is the probability that a product will fail due to the third machine? 9. TF Four consecutive activities in a project each have a triangular distribution with variance 2. The standard deviation of the total time is

Explanation / Answer

1:

Yes since population size is small so sampling should be done with replacement.

Answer: true

2:

Out of 52 cards, for other 52-7 = 45 cads are remaining out of which 2 are nine and 43 are other. So the probability that player have no nine is

C(43,7) / C(45/7) = 0.7101

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