Statistics Quiz 7 version 1 name: 1. Find the critical value o o 99.0 percent. 2L corresponding to a sample size of 6 and a confidence level of 0.412 A 2. Determine the corresponding z values for a 92.5 percent confidence interval. B 0.922 C 16.75 D 1.078 B z/2 = 1.7 C z/2 = 1.82 D z/2 = 1.85 o o E z/2 = 1.72 A z/2 = 1.78 F 3. Of 649 adults selected randomly from one town, 54 of them smoke. Construct a 92.5 percent n interval for the true pero centage of all adults in the town that smoke. o None of These A 0.0639 < p < 0.10251 B 0.0139 < p < 0.13251 C 4. Determine the corresponding t values for the indicated area assume df = 6. None of These A t = 3.707428 NOT TO SCALE B t = 3.617 C o o 2017 daabz.com t = 3.767 D None of These Statistics Quiz 7 version 1 page 1 of 8 Statistics Quiz 7 version 1 (page 2/ 8) o o 5. The confidence Interval for the standard deviation is given by (n 1)s2 (n 1)s2 << 2 R 2L A 6. Determine the corresponding t values for the indicated area assume df = 4. True B False A t = 3.817 NOT TO SCALE B t = 3.707 C t = 3.74695 o o D 7. Use the given data to construct a confidence interval for the population mean, . Assume that the population has a normal distribution: n = 10, x = 12.7, s = 3.7, confidence level= 95.0 o percent. o None of These B 10.05318 < < 15.34682 C 9.75318 < < 15.84682 A D 10 < < 15 9.75318 < < 15.44682 o o 8. The confidence Interval for the variance is given by (n 1)s2 (n 1)s2 < 2 < 2 R 2L 2017 daabz.com A False Statistics Quiz 7 version 1 B True page 2 of 8 Statistics Quiz 7 version 1 (page 3/ 8) 9. IF o o then we use is UNKNOWN t distribution A and B z distribution variable is normally distributed o o 10. The confidence Interval for the mean is given by x E < 30 27. Find the critical value o o 90.0 percent. 2R corresponding to a sample size of 4 and a confidence level of A 0.352 B 7.815 2017 daabz.com 8.481 D 0.315 o o 28. The confidence Interval for the mean is given by x E < 30 2017 daabz.com Statistics Quiz 7 version 1 page 8 of 8