27. n = 11, 90% confidence A. 1.714 B. 1.812 C.2.120 28. n = 24, 90% confidence A 1.714 B. 1.812 C.2.120 29. n = 17, 95% confidence A. 1.714 B. 1.812 C. 2.120 30. n=8, 99% confidence B. 1.714 B. 1.812 C.2.120 31. A statistical analysis of numerical data including an end note. A. Conclusion B. Data C. Interpretation​