Answer Happy

8. (Chapter 10) The 90% confidence interval for u is (180.5325, 185.4675). What is the 99% confidence interval? a. (181.4324, 183.4234) b. (180.0600, 185.9400) c. (179.1360, 186.8640) d. (178.1232, 187.1987) 9. (Chapter 11) Polices are concerned that vehicles driving in a school zone often exceed the posted speed limit. To gather data on the speed of vehicles, polices placed a radar speed detector and recorded the speed of cars over a 15-minute period. The speeds are shown below: 24; 29; 29; 23; 25; 24; 33; 26; 24; 29; 27; 26; 22; 32; 24; 21; 19; 29; 31; 26; 29; 31; 16 Summary statistics: = 26.04, s = 4.25, n = 23. Then, the 90% confidence interval for the (population) mean speed limit in a school zone is: a. 26.04 ± 20.954.25 4.25 b. 26.04 ±20.90 23 4.25 c. 26.04t22,0.95 √23 4.25 d. 26.04t23,0.90 √23 10. (Chapter 11) A study of 10 adults that used a one-sample t-test for BMI data to address Ho: = 24 vs. Ha: > 24 reported a tatat of 1.30. What is one-sided p-value for this test? a. 0.85 < p < 0.90 b. 0.05 <p <0.10 c. 0.10 < p <0.15 d. 0.20 < p <0.30