Textbook Notes (368,164)
Canada (161,688)
Psychology (1,112)
PSYC 202 (19)
Chapter 10

PSYC202 Chapter 10 Independent Samples T Statistic.docx

2 Pages
67 Views
Unlock Document

Department
Psychology
Course
PSYC 202
Professor
Ronald R Holden
Semester
Fall

Description
PSYC202 Chapter 10: t Test for 2 Independent Samples 10.1 Introduction of Independent­Measures Designs ­ Independent Measures/Between­Subjects Design: a research design that uses a  separate sample for each treatment condition (ex. Comparing men vs. women, method A  teaching vs. method B) ­ Repeated Measures/Within­Subjects Design: when 2 sets of data come from the same  sample 10.2 The t Statistic for an Independent­Measures Research Design ­ Null hypothesis for independent measures test: H : µ ­µ  = 00(no1dif2erence between  population means) or µ  = µ 1 2 ­ Previous t statistic was for single sample. New t statistic for independent measures ­ t = sample mean difference – population mean difference = (M ­M ) – (µ ­µ ) 1 2 1 2 estimated standard error s(M ­1 ) 2 ­ Null hypothesis sets population means to zero so      t = (M ­M ) 1 2 s(M ­1 ) 2 ­ the t statistic standard error formula is only accurate if sample size ‘n’ is the same for  both samples. If sample size different, then the equation is biased ­ Pooled Variance: averaging the 2 variances, allowing the bigger sample (higher  accuracy) more weight in determining final value 2 ­ s p SS +S1 2            1f  + d2 ­ Basically, t = data – hypothesis     error 10.3 Hypothesis Tests and Effect Size with the Independent­Measures t Statistic ­ State null hypothesis ­ Find degrees of freedom ­ Calculate pooled variance  ▯then estimated standard error  ▯t­statistic  ▯compare to  critical regions ­ Cohen’s d calculation changes, but r  stays the same 10.4 Assumptions Underlying the Indepen
More Less

Related notes for PSYC 202

Log In


OR

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


OR

By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.


Submit