1. INFERENCE Farrokh Alemi Ph.D.

2. Point Estimates

3. Point Estimates Vary

11. Standard Error of Observations

12. Standard Error of Sample Mean

18. Confidence Interval

22. Mean of the Population

23. Confidence Interval

24. Approximate Percent of Observations

25. Near Normal Distribution

26. Percent of Observations

30. All Roads End in Normal

31. 95% Confidence Interval

32. Mean of Sample Observations

33. Z Parameter

34. Standard Error of Mean

35. Margin of Error

36. We are XX% confident that the population parameter is between... Interpretation of Interval

37. Confidence Interval provides a range of values that contain the true mean x% of time Take Home Lesson

38. What is the 95% confidence interval for mean of a sample with following 4 observations: 50, 55, 50 and 40. What assumptions you have made. Do One