Details Extra Credit Homework due NOW Reading Chapter

Details • Extra Credit Homework due NOW • Reading, Chapter 7 pages 210 -216 & 220 -224 • Final Exam, Tuesday March 23, 8: 00 -10: 00 am – Bring: • • Scantron F-288 ERI-L #2 Pencil Calculator 8 ½ x 11 page of notes • Pick up a registration code for 10 C

Outline • T-test and CI for difference between two means, small samples • Review questions for final • Midterm 2 “challenging” questions

Topics since midterm 2 Yes, the final exam is cumulative

T test for two means Incomes of Men and Women Small Samples Use alpha =. 05 Two-tailed test 1990 US Census

Incomes of Men and Women Small Samples! 1990 US Census

alpha =. 05 Two-tailed P value between 2 x. 1 and 2 x. 05 between. 2 and. 1 df=19 95% CI

95% Confidence Interval Incomes of Men and Women

Review Questions for Final Exam

Obtained Z Critical value of Z = +/-1. 96 Alpha =. 05 Two tailed ½ of. 05 =. 025 P Value is Less than 2 x. 000000287

P Value is Less than. 000000574

Conclusion?

Conclusion? Reject the null hypothesis

Alpha df

Political Party-- Republican or Democrat Voted for GW? -- Yes or No?

Sex – male or female Support abortion rights? – yes or no

Occupation – professional or unskilled Belong to a voluntary organization? -- Yes or no

College graduate? – yes or no Income – income measured in dollars

Level of education – measured in years Income – measured in dollars

Length of time in neighborhood – measured in years Number of neighbors they know – count up the number

Income – measured in dollars Vacation in Tahiti? – yes or no