Bias & Assumptions
A data point that is much different than the others
As X increases, Y decreases
What is a negative correlation?
This influences variance in a regression and must be checked for
What is (multi)collinearity?
This type of t-test compares a sample mean to a known population mean
What is one-sample t-test?
p-values less than this value are significant
What is .05?
This is sometimes used to reduce skew
What is data transformation?
This type of correlation is used to reduce the influence of a third variable
What is partial correlation?
This type of regression is used when controlling for some variables
What is hierarchical regression?
The number of independent variables that can be used in a t-test
What is one?
This type of variable is also known as ranks
What is ordinal?
A test for homogeneity of variance in which we desire a non-significant result
What is Levene's test?
This is used to test the relationship between 2 ordinal variables
What is Spearman correlation
This determines the strength of the relationship between a predictor and an outcome variable
What is beta coefficient?
This is a limitation of using a repeated-measures t-test
What is order effects?
Mean and standard deviation (SD) are not reported for this type of variable
What is categorical/nominal?
The assumption that the value of one observation does not influence or affect the value of other observations
What is independence (of data/observations)?
The non-parametric equivalent of an independent-samples t-test
What is Mann-Whitney U test?
This is what determines the direction of the relationship in a regression equation
What is b?
This is another name for repeated-measures t-test
This determines what makes something an experiment (vs. correlation)
What is manipulation of independent variable?
A technique used to estimate the properties of the sampling distribution from the sample data
What is bootstrapping?
This concept reduces the strength of a correlation
What is restricted range?
This determines the significance of regression
What is the F-ratio?
The type of t-test used to compare male and female reaction times
What is independent-samples t-test?
This states that a larger sample will be more representative of a population