STAT 350 Lecture Notes - Lecture 1: Unimodality, Statistical Inference, Sample Size Determination

• School: George Mason University
• Department: Statistics
• Course: STAT 350
• Professor: David Holmes

Document Summary

Parameter - population measures (in practice, value unknown) Point estimate - single number from data that can be used as estimate of target. Confidence interval estimates are a range of plausible values that contain target. Give intervals in terms of point estimates +/- something parameters with certain degree of confidence. How certain we want to be . Degree of certainty is called level of confidence. Confidence level - how confident we are in method used to construct an interval. Different random samples will lead to different intervals. X +/- (z critical value or z score)( / If is unknown, t-distribution is used. List values of t for different degrees of freedom. areas in right hand tail. Areas on left equivalent to mass on right. Jmp help sample data sciences michelson. Margin of error increases as confidence level increases. T-test statistic tells how far we are from hypothesis value. P-value - probability that we obtain observed value.