Term

Definition
when tests are used to relate the characteristics of a small group (sample) to those of a larger group (population) 


Term

Definition
uses inferential statistics for obtaining knowledge
 requires both the development of a hypothesis and an inferential stats test 


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Definition
statement of a presumed association b/t at least 2 variables in a population 


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Definition
what hte researcher actually believes will occur 


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Definition
statement that there is no relationship b/t variables
This is what you use in inferential stats 


Term
what is assumed about the relationship b/t variables? 

Definition
that there is no relationship untill there is evidence to the contrary 


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Definition
a statement that there is a relationship 


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Definition


Term
probability (alpha level) is established at? 

Definition
A level that is considered significant this level is set at p<.05 to reject null hypothesis 


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Definition
that null hypothesis is rejected  95% of time same results are expected 


Term
the probability of making an incorrect conclusion is the same as... 

Definition


Term

Definition
to conclude there is a correlation or difference b/t two variables when there is not 


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Definition
to conclude there is no relationship b/t variables when there is a true relationship 


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Definition
x, presumed cause, manipulated, predictor, antecedent 


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Definition
y, presumed effect, outcome, criterion, consequence 


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Definition
determines if there is an association b/t two "nominally" scaled variables 


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Definition
to examine the difference b/t two variables (w/ continuous interval or ratio type datea) 


Term
ttests for independent groups 

Definition
groups not related in any way 


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ttests: dependent test for paired group 

Definition
matched on some characteristics 


Term

Definition
independent and dependent test for paired groups 


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Definition
analysis of variance parametric statistic for continuous interval or ratio type data  used to determine if sig differences exist among means from 3 or more sets of data 


Term

Definition
compares variability among group means(b/t group) w/ the variability of scores w/in groups
= avg. var. b/t group / avg. var. w/in groups 


Term
why not perform mult ttests to determine diff b/t means? 

Definition
alpha lever becomes inflated w/ mult ttests on samples taken from same population greater chance of making type 1 error 


Term
single ttest's findings are compared to... 

Definition
the probability of chance 


Term
with multiple ttests conducted on samples randomly drawn from the same population... 

Definition
the odds of finding the one deviant conclusion that would occur by chance alone increase 


Term
ANOVA eliminates what and how? 

Definition
What? familywise error rate
how? by making all possible comparisons among the means in a single test 


Term
when mult ttests are made on samples from same population what must happen to alpha level? 

Definition
the alpha level must be adjusted 


Term

Definition
divide the single test alhpa level by the number of ttests to be performed
Ex: for 5 ttests to be made at p<.05 then .05/5 =.01. This doesn't reject Hypothesus because its not lower than p<.01 


Term
ttest bases info on ____ groups only ANOVA employs ___________ on all groups ______ 

Definition
2.
all information, simultaneously 


Term
when a sig Fratio is found than additional what must be performed? 

Definition
post hoc (after the fact) 


Term
ANOVA (oneway) each participant has scores on two variables: 

Definition
a factor (independent variable) and a dependent variable 


Term
the factor(independent variable) divides individuals into.... 

Definition
two or more groups or levels 


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dependent variable differentiats individuals on what? 

Definition


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ANOVA (twoway) how many scores does participant have? 

Definition
3 variables: two factors and a dependent variable 


Term
factor divides cases into....1 dependent variable defines cases on 2) 

Definition
1) two or more levels 2) a quantitative dimension 


Term
higher way ANOVA's have more than two factors in design: 

Definition
1) each participant must have scores on at least 4 variables (3 or more factors and a dependent variable)
2) Ftests are performed on multiple effects 

