Stat200-lecture3Sept14Fl09Sect1_4_web

Stat200-lecture3Sept14Fl09Sect1_4_web - Chapter 6:...

Info iconThis preview shows pages 1–13. Sign up to view the full content.

View Full Document Right Arrow Icon
1 Chapter 6: Categorical Data Stat 200 Sections 1- 4 Mon Sept 14, 2009 LQ3
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
2 Announcements Lecture Quiz 3 (LQ3): Take between after class & 4:00 AM Tues Exam 1 will be available for review later today (also will be posted for practice) HW2 Problems are listed on Week 4 Agenda: Submit answers between Thurs 12:30 PM & 4:00 AM Friday Try some problems before lab tomorrow Thurs A few slides will be posted by Wed for review for Thurs class Also complete readings Learn how to obtain normal probabilities
Background image of page 2
3 Exam 1 Results Item Q 1 Median Q 3 Max Mean St dev Exam 1 79 pts (72%) 92 pts (84%) 99 pts (90%) 108 pts (98%) 85 pts (77%) 24 pts (20%)
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
4 Breakdown of Statistical Methods Statistical Methods Descriptive Methods Inferential Methods Graphs Numbers Confidence Intervals Hypothesis Tests (P-value) Describe Samples Conclusions about population
Background image of page 4
5 Two Categorical Variables Summarized in Contingency Tables 2 Way Tables 2X2 Tables Tables larger than 2X2 tables Do Today Do later
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
6 Example 1: Two Survey Questions 1. What is your gender (Female, Male) 2. Do you have a PSU fitness membership? (Yes, No) Question: Is there a link between the two questions?
Background image of page 6
7 Example 1: Descriptively Relationship is Found Between The Two Variables 0 10 20 30 40 50 60 70 Percent Female Male PSU Fitness Membership Yes No
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
8 Example 1: 2X2 Contingency Table Yes No Row Total Female 212 134 346 Male 122 117 239 Column Total 334 251 585 Explanatory Variable: ____________ Response Variable: ______________ Data in Table is: raw (original) summarized
Background image of page 8
9 Example 1: Conditional Probabilities Question 1: Given that a student is a female, what percent have a membership? Answer: Question 2: Given that a student is a male, what percent have a membership? Answer: Question1 Yes No Total Female 212 134 346 Male 122 117 239 Total 334 251 585 Question 2 Yes No Total Female 212 134 346 Male 122 117 239 Total 334 251 585
Background image of page 9

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
10 Example 1: 2X2 Contingency Table Yes No Row Total Female 212 (61%) 134 346 Male 122 (51%) 117 239 Column Total 334 251 585 Difference in Row Percents: ________ Descriptive Conclusion: the ____________ the difference ____________ the support for a relationship (difference)
Background image of page 10
11 Example 1: 2X2 Redundant information when consider the “no’s Yes No Row Total Female 212 (61%) 134 (39%) 346 Male 122 (51%) 117 (49%) 239 Column Total 334 251 585 Row Percent (yes): 61% - 51% = 10% Row Percent (no): 49% - 39% = ____
Background image of page 11

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
12 Overall Summary: Categorical Data (2 X 2 Tables) 2 X 2 Tables Descriptive Methods Inferential Methods Row Percents Two- Dimensional Bar Graph 95% C.I.’s P-value: Significance Test Do now Do later Add count comparison
Background image of page 12
Image of page 13
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 09/15/2009 for the course STAT 200 taught by Professor Barroso,joaor during the Fall '08 term at Penn State.

Page1 / 43

Stat200-lecture3Sept14Fl09Sect1_4_web - Chapter 6:...

This preview shows document pages 1 - 13. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online