Bio 356 Homework 6: Confidence Intervals and T-Tests - Prof. Emily Carrington, Assignments of Biology

Download Bio 356 Homework 6: Confidence Intervals and T-Tests - Prof. Emily Carrington and more Assignments Biology in PDF only on Docsity! 1 Homework 6: Confidence intervals and t-tests Name ______________________ Bio 356: Due Wed Nov 12, 2008 Section/ TA _________________ 1. Sample mean = True mean = 2. ______________________ and ________________________ 3. Confidence interval α Rank from smallest (1) to largest (3) extent Rank from most (1) to least (3) likely to include true mean 50% 95% 99% 4. Mean = ___________ Standard deviation = ___________ 5. Circle one: 95%/ 99% 6. Circle one: 95%/ 99% 7. Circle one: Larger/ Same/ Smaller 8. Circle one: Larger/ Same/ Smaller 9. 10. df = ___________, t= __________ 11. Shaded area = ______________ (3 significant figures) 12. Circle one: One/ Two 13. Circle one: More/ Same/ Less 14. df = _________, α = __________, critical t-value= ________ 15. Circle one: Wider/ No change/ Narrower 16. Circle one: Wider/ No change/ Narrower 17. Circle one: Increase/ No change/ Decrease 18. Circle one: Increase/ No change/ Decrease 19. Circle one: Yes/ No, Circle one: Flooded/ Neither/ Unflooded 20. df = _______________, critical t-value= ______________ 21. Flooded: x=______+/-________, Unflooded: x=_______+/-________ 22. Circle one: Yes/ No Why? 23. Hypothesis = 24. Alternative hypothesis = 25. t-values Reject null hypothesis? Yes or no If critical t-value corresponds to α=0.05, is p>0.05 or p<0.05? Statistically different? Yes or no Calculated > critical Calculated < critical 26. pooled df=______, calculated t-statistic =_________, critical t-value = ___________ 27.