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25 Cards in this Set
 Front
 Back
When should you catagorize data?

After you have collected and examined them.


tTest
definition 
A bivariate analysis that examines the differences between the 2 groups by looking at their means while weighing the sampling error


tTest
calculation 
Calculation:
Group 1 Mean  Group 2 Mean  Standard error of the difference 

Degrees of Freedom
definition 
A numerical way of expressing how much capacity the data have to vary


Independentsamples tTest
definition 
A tTest used when 2 group are not connected or related to each other in a direct way


Correlatedsamples tTest is also known as....

PairedSamples tTest


CorrelatedSamples tTest
definition 
Compares measurements taken at 2 different points in time from a single group of clients to determine if there is a real difference


CorrelatedSamples tTest is used when measuring...

1)Same group measured 2*
2)Samples are known logically 3)Used to construct a 2nd group that closely resembles the 1st 4)Differences btw. biological twins 5) Pretest Posttest Comparisons of 1 group 

OneSample tTest
defintion 
Used to determine if a randomly drawn sample is representative of the population


OneSample tTest is used when...

The population parameters are already known


ANOVA stands for...

Oneway Analysis of Variance


ANOVA
definition 
Statistical procedure used when with an interval dependent variable and 2+ groups


ANOVA is based on...

The variance within groups and between groups


ANOVA allows the researcher to...

Understand if the groups signficantly vary


4 Questions a researcher should consider with ANOVA

1)Is data measured at interval and are they a random sample of larger populations?
2)Are the groups independent of each other? 3) Are the data normally distributed? 4) Is there approximately the same # of cases in each group? 

ANOVA df will equal...

The number of subjects minus 1


Post Hoc Tests is used when...

Used with multiple groups beinig compared and F is signficant


Post Hoc Tests are done when the researcher is investigating...

What contributed to the finding of signficance


Bonferroni Procedure
definition 
Reduces the problem of finding signficance by dividing the .05 probablity level by the number of statistical tests to be conducted


The Post Hoc procedures minimize what?

Type 1 Error


When should you catagorize data?

After you have collected and examined them.


Paired tTest are used when you have...

A single (1) group is measured mutliple times


If you have Pretest, Intervention, and Posttest you use what tTest?

Paired tTest


Independent tTest is used when you have...

2 groups NOT connected in a direct way


Assumptions of TTests:

1) Dependent variable is continuous
2) Normal distribution 3) Large sample to be accurate sample size  minimum 