418-IndependentSampleT-ExtraPractice - 1 The t-statistic...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon

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

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: 1 The t-statistic: independent groups (chapter 7) Assumptions for Independent Groups t Test Random selection of participants Independence of Observations Normal population distribution Homogeneity of variance Interval or ratio data Independent Samples t-test Extra Practice Suppose that we plan to conduct a study to alleviate the distress of preschool children who are about to undergo the Fnger-stick procedure for a hematocrit (Hct) determination. Note: Hct = % of volume of a blood sample occupied by cells. 2 Twenty subjects will be used to examine the effectiveness of the special treatment. 10 subjects randomly assigned to treatment group. 10 assigned to a control group that receives no special preparation. Independent Samples t-test Extra Practice Testing hypothesis about two independent means (t-test) Dependent variable = the child ’ s pulse rate just prior to the Fnger-stick Independent variable or grouping variable = treatment conditions (2 levels) Independent Samples t-test...
View Full Document

Page1 / 7

418-IndependentSampleT-ExtraPractice - 1 The t-statistic...

This preview shows document pages 1 - 3. Sign up to view the full document.

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