Show:
General Theory
Descriptive Statistics 1
Descriptive/Inferential Statistics
Anything Goes
Application
100
To explain variance.
What is the purpose of statistics?
100
Mean, median, and mode.
What are measures of central tendency?
100
May be a better measure of central tendency when outliers are present.
What is the median?
100
Refers to the number of scores that are free to vary.
What is "degrees of freedom?"
100
A measure of location that tells us how many standard deviations a score is above or below the mean of the distribution.
What is a standard score?
200
Used to describe data quantitatively.
What are descriptive statistics?
200
Range, variance, and standard deviation.
What are measures of dispersion?
200
Is an unstable measure of dispersion.
What is the range?
200
Refers to the horizontal spread of the distribution.
What is variability?
200
A statistical method that could be used to study the relationship between caffeine intake and insomnia.
What is correlation?
300
Used to infer meaning and results from data.
What are inferential statistics?
300
When the mean, median, and mode are approximately equal.
What is a normal distribution?
300
The square root of the average squared deviation from the mean.
What is the standard deviation?
300
Used to describe research designs when there is more than one independent variable.
What is a factorial design?
300
A statistical test that could be used if I want to compare BDI scores of individuals assigned to either a CBT treatment group or a control group.
What is a t-test?
400
Shows the number of individuals that fall into a particular category.
What is a frequency distribution?
400
When the tail of the curve points to the low end of the scale.
What is negative skew?
400
Represents the degree of linear relationship between variables.
What is a correlation coefficient?
400
When data points move in the same direction with one another in a predictable manner.
What is positive correlation?
400
A statistical test that could be used if I want to compare BDI scores between four groups: CBT, psychodynamic, humanistic, and control.
What is an ANOVA?
500
Enables us to see relationships between pairs of variables that are typical nominal or ordinal.
What is cross-tabulation?
500
When the mean is less than the median, which is less than the mode.
What is negative skew?
500
When the tail of the curve points to the high end of the scale.
What is positive skew?
500
When the mode is less than the median, which is less than the mean.
What is positive skew?
500
A statistical method that can be used if I want to predict SAT scores from IQ scores.
What is regression?