Answer all questions with explanation

10. What (smallest) sample size would you need to estimate a population proportion to within 2% with 99% confidence if you have no information already about that proportion? A. 16, 641 B. 4, 161 C. 9.604 D. 2,401 (2) 11. What is Zsample (the observed value of the sample statistic) in a test for one population mean where Ho: # = 90 and, in the usual notation, x = 93, s = 8,n = 120? A. 0.375 B. 4.1079 C. 0.5138 D. 2.2537 (2) 12. In a hypothesis test (of any kind) where the significance level is 0.01 and you have found a p-value of 0.028, you should reject the null hypothesis Ho. A True. B. False. (1) 13. You are carrying out a hypothesis test for one mean and HA is two-sided, Your observed value of z (what we call Zsample Of Zobserved in class) is 2.12. What is the p-value for this test? A. 0.017 B. 0.034 C. 0.983 D. 0.966. (2) 14. You are doing a hypothesis test for one population proportion with Ho: p = 0.35. In a random sample of size 200 you had 76 "successes". What is your Zsample here? (You do not need HA) A. 0.7742 B. 1.3726 C. 1.1583 D. 0.8895 (2)