# Week 4 Hypothesis testing Construction

47 %
53 %
Information about Week 4 Hypothesis testing Construction
Education

Published on February 1, 2008

Author: physioactive

Source: authorstream.com

Hypothesis Testing & Construction:  Hypothesis Testing & Construction Chee-Wee Tan P1112 What are hypotheses?:  What are hypotheses? Hypothesis testing – put forward a statement / question for testing whether its true. H1 – Experimental Hypothesis H0 – Null hypothesis What are hypotheses?:  What are hypotheses? H1 – Watching day-time TV increases a person’s boredom H0 – Watching day-time TV does not increase a person’s boredom. Why use the null hypothesis?:  Why use the null hypothesis? You can never prove a hypothesis but only disprove it. A scientific theory is falsifiable. Spot the Vulcan contest How to test a hypothesis?:  How to test a hypothesis? If probability of results happening by chance decreases, more confident of rejecting null hypothesis. Convention: if result happening by chance is less than 5%, reject null hypothesis. How to test a hypothesis? :  How to test a hypothesis? Steps: Construct null hypothesis and experimental hypothesis. Administer intervention to one of the groups with the other acting as control. Calculate the probability of an effect happening by chance. If less than 5%, reject null hypothesis. How to test a hypothesis:  How to test a hypothesis H0: Students with enforced laziness does not have worse exam grades than students without enforced laziness. Class Enforced Laziness Control Exams P =0.3 Compare Determining if samples are different:  Determining if samples are different Depends on: Research design Statistical test 2 types of variation Systematic Unsystematic Test statistic and variations:  Test statistic and variations Test statistic: number with known characteristic. Examples, t and F. Tests statistic = Systematic variance Unsystematic variance The larger the test statistic, the better. Two mistakes we must know:  Two mistakes we must know Effect No effect Effect No effect Findings Actual Type I & II errors:  Type I & II errors Type I error (α-level) Usually set at 0.05 Type II error (β-level) Maximum acceptable level = 0.2 Increasing α will decrease β, vice versa Where is my sweater? Effect size:  Effect size If an effect exists, doesn’t mean it’s important or meaningful. Need to find effect size – The magnitude of the effect Used in meta-analysis Statistics: d, r, q, g, h, w, f & f2 Summary:  Summary Hypothesis testing Null hypothesis How hypothesis testing works Test statistics & variations Type I & II errors Effect size Resistance is futile, assimilate knowledge

 User name: Comment:

## Related presentations

#### How Do I Pass Cisco 300-425 Certification in First...

September 26, 2020

#### Top 3 Anti Plagiarism Software In India For Univer...

September 25, 2020

#### Things to know about Arthroscopy | Dr. Ketas Mahaj...

September 26, 2020

#### Top 10 best international schools in Singapore

September 26, 2020

#### Latest Questions Answers for SAP BI C_TB1200_93 Ce...

September 26, 2020

#### [2020] 10 Actionable Tips to Ace Your Oracle 1Z0-4...

September 26, 2020

## Related pages

### Statistics- Week 4 Project: Confidence Intervals and ...

Week 4 Project: Confidence Intervals and Hypothesis Testing. Descriptive Statistics. 1) ... STAT 3001 Week 4 Project. Hypothesis Testing. 7) ...

### Week Four - Scribd

1 Week Four Discussion QuestionWeek Four: ... What are the five steps in the hypothesis testing procedure? ... RES 351 Week 4 Team Assignment Business ...

### Hypothesis Testing I - University of Queensland

56 Hypothesis Testing I Tests for the Mean WEEK EIGHT This worksheet relates to chapter eight of the text book (Statistics for Managers 4th Edition).

### res 342 week 4 Team Assignment Nonparametric Hypothesis ...

... res 342 week 4 Team Assignment Nonparametric Hypothesis Testing ... Res 342 week 4 Team Assignment ... we will look at Nonparametric Hypothesis Testing ...

### Fin 380 week 4 summary - mavadconstruction.com

ACC 300 Week 4 Individual Problem Set II ... Res 342 week 4 team assignment nonparametric hypothesis testing ... Our construction management ...

### Impact of Extended Overtime on Construction Labor ...

... overtime on construction labor productivity. The results show a decrease in productivity as the number of hours worked per week ... 4. Hypothesis ...

### Unit 7 – Hypothesis Testing Practice Problems Week #12 ...

... Hypothesis Testing Practice Problems Week #12 ... whether or not the work output is different for construction workers employed by the state and ... 4 ...

### Unit 7 – Hypothesis Testing Week #11 - Practice Problems ...

... Hypothesis Testing Week #11 ... whether or not the work output is different for construction workers employed by the state and ... 4.60000 . 95% CI for ...

### Qnt 351 Week 4 Learning Team Reflection Free Essays

PM 598 Week 4 Learning Team Reflection ... ﻿ Hypothesis Testing QNT/351 February 4, 2015 Hypothesis Testing The purpose of ... Week 4_____ Week____4 ...

### PPT – Hypothesis Construction PowerPoint presentation ...

Hypothesis Construction - PowerPoint PPT Presentation. The presentation will start after a short (15 second) video ad from one of our sponsors.