Question

12. Using the letters in "BANANA", since there are 3 As, and 2 Ns, the number of different arrangements of the letters is: a) 30 c) 120 d)720 e) none of these 13. You decide to watch 4 shows. If there are 8 shows from which to choose, then in how you select the 4 shows you will watch? 70 c) 256 d) 1680 ) none of these c) 1.5 c) 1.5 14. Find the mean of a binomial distribution where n- 4 and p 5 15. Find the s deviation of a binomial distribution where n-4 and p s 16. Given a binomial distribution with 11 events and the probability of success for an event equal to 25 what's the probability of getting at least 4 successes? a) 2867 b) 4552 5448 d 8029 e a)'7486 (b) .2514 c) .8413 d) .1056 e) .7357 a) .7486 b) 2514 8413 d) 1056 7357 proportion of scores less than 88. none of these 17. Find the area under the normal curve to the right of z- 67 18. Find the area under the normal curve between z1.25 and 1.0 19. IfIQ scores are normally distributed with a mean of 100 and a standard deviation of 15, find the a) 3173 b) 6827 ( 0359 e) 1587 a) 3173 b) .6827 distribution of all possible samples of size 100. The mean of the sample means is equal to: 20. Same as above except find the proportion of scores greater than 1 standard deviation from the mean. 21. Consider a university with a population mean GPA of 2.95, a standard deviation of 2, and a sampling 22. Same as above, the standard deviation of the sample means is equal to 23. What is the effect of choosing a larger sample size for the sampling distribution? 2119 d 0359 .1587 .02 295 e) 025 a) 2.45 b) .2 d) 2.95 e .025 a mean increases, standard deviati c) mean unchanged, standard deviation increases e) no effect ion unchanged b) mean decreases, standard deviation unchanged d) mean unchanged, standard deviation decreases and the sampling distribution of the mean will have relatively As sample size increases little dispersion resulting in sample means falling relatively a) increases, far from b) decreases, far Irom c) increases, close tol d) decreases, close to e) none 24. the population mean. 25. Given a test statistic of 2.09 paired with a critical z-score of 1.65 on a one tailed test, then the conclusion fail to reiect Ho at α-1%bfail to reject Hatu-5% c)reject He and accept Ha at α-196 ay reject Ho and accept Haat.-5% e) none ofthese

Answer 1

6 1 3! 21 60 41 4 =70 14 @j sta divs jap IS) Jaxosao s yl 0.2514 V