What affects the dependent variable in the experiment?
100
ANOVA
What statistical test is appropriate for between or within group designs that have 1 independent variable with three levels?
100
Negatively skewed distribution
When is the mean of the distribution less than the median of the distribution?
When is there a clustering of cases to the right with the left tail extended?
100
Type I error
What occurs when the null hypothesis is rejected, when it is actually true?
100
Test-retest, inter-rater, alternate forms
What are different types of reliability?
200
Dichotomous data
What kind of data type has only two possible values?
200
Discriminant Analysis
What statistical test is appropriate when the goal is to predict group membership?
200
Data transformation
What is the mathematical process used to reduce skewness, kurtosis, etc.?
200
Type II error
What occurs when the null hypothesis is retained, when it is actually false?
200
Using multiple inferential tests instead of a single test or using measures that have poor reliability
What is a threat to statistical conclusion validity?
300
Dependent variable
What type of variable is thought to change in association with changes in the independent variable?
300
Systematic Error
What is the type of error that occurs due to characteristics of the sample?
300
Standard deviation, variance, and range
What are measures of dispersion?
300
Sig- or p-value on a statistical analysis printout
What is the probability of occurrence for the associated results?
300
Narrow sampling
What is a threat to external validity?
400
Interval data
What kind of data type is used when data is continuous, but does not have a constant ratio between the range of possible values (e.g. no true 0)?
400
Random error
What kind of error that occurs because a sample is not able to perfectly represent the population?
400
68%
What is the percentage of the normal distribution that lies within one standard deviation of the mean?
400
Bonferroni adjustment
What reduces experiment-wise error when using multiple comparisons?
400
History and maturation
What are threats to internal validity?
500
Mean of the sampling distribution
What is approximately equal to the mean of the population when the sample size is 20 or greater?
500
Experimental design
What kind of design requires random assignment?
500
Z-score, T-Score, and IQ scores
What are standard scores or measures of location?
500
Sample size, effect size, and alpha
What are components that comprise the construct of "power?"
500
Determining the actual aspects of the experiment that influenced the result