1 / 4

Statistics and Research methods

Statistics and Research methods. Wiskunde voor HMI Bijeenkomst 5. t Test for Independent Means. Between-subjects design (two experimental groups) Scores of two groups Experimental group and control group Use differences between means

donny
Télécharger la présentation

Statistics and Research methods

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Statistics and Research methods Wiskunde voor HMI Bijeenkomst 5

  2. t Test for Independent Means • Between-subjects design (two experimental groups) • Scores of two groups • Experimental group and control group • Use differences between means • Population 1: people in experimental group Population 2: people in control group • Comparison distribution: distribution of differences between means, μ = 0, δ unknown, estimate from samples →Sdifference • df = df1 + df2 with df1 =N1 – 1 ; df2 = N2 - 1

  3. Analysis of variance (ANOVA) • Comparison of more than two groups • ANOVA used for two groups gives the same result as t-test for independent means • F distribution (F table) • F ratio = between-groups estimate of population variance / within-groups estimate of poputation variance • dfBetween = Ngroups – 1 • dfWithin = df1 + df2 + … + dfNgroups

  4. Other issues on paper • CHI-square test • Reliability of measures • Factor analysis

More Related