STT 200 LECTURE 1 SECTION 2 4 RECITATION
- Slides: 13
STT 200 – LECTURE 1, SECTION 2, 4 RECITATION 13 (11/27/2012) TA: Zhen (Alan) Zhang zhangz 19@stt. msu. edu Office hour: (C 500 WH) 1: 45 – 2: 45 PM Tuesday (office tel. : 432 -3342) Help-room: (A 102 WH) 11: 20 AM-12: 30 PM, Monday, Friday 1 Class meet on Tuesday: 3: 00 – 3: 50 PM A 122 WH, Section 02 12: 40 – 1: 30 PM A 322 WH, Section 04
OVERVIEW We will discuss following problems: q Chapter 19 “Confidence Intervals for Proportions” (Page 504) Nos. 7, 8, 14, 22, 27, 28 All recitation Power. Point slides available at here 2
3
Review (cont’d) Margin of error 4
5
Chapter 19 (Page 504): #7: Which statements are true? a) For a given sample size, higher confidence means a smaller margin of error. b) For a specified confidence level, larger samples provides smaller margins of error. c) For a fixed margin of error, larger samples provide greater confidence. d) For a given confidence level, halving the margin of error requires a sample twice as large. 6
Chapter 19 (Page 504): #8: Which statements are true? a) For a given sample size, reducing the margin of error will mean lower confidence. b) For a certain confidence level, you can get a smaller margin of error by selecting a bigger sample. c) For a fixed margin of error, smaller samples will mean lower confidence. d) For a given confidence level, a sample 9 times as large will make a margin of error one third as big. 7
8
9
10
11
12
Thank you. 13
