Question
without replacing the first, what is the probability of getting I green ball and I yellow ball picked? A) 1/32. B) 8/33. C) 2/12. D) None of the above. 4. The standard deviation of a sampling distribution is called A) standard error. B) variance. C) confidence interval. D) none of the above. 5. For a hypothesis testing Omar managed to get some required information but his sample size is 25 only. So, for the above purpose, he should use A) either t' test or Z' test. B) ‘Z' test. C) 't' test. D) none of the above. 6. When a card is picked from a thoroughly shuffled pack of cards, A) getting a ‘king, is one event and getting a 'queen, is another event. B) getting an 'ace' and getting a 'jack' are mutually exclusive events. C) getting a face card (cards with faces) and getting a non-face card (cards with numbers) ane complementary events to each other. D) all the above statements are correct.
Explanation / Answer
3) P(1 green ball and 1 yellow ball) = 2 * 8/12 * 4/11 = 8/33
Option-D) None of these
4) Option-A) Standard error
5) Option-A) either 't' test or 'Z' test
6) Option-D) All the above statements are false
