ANOVA
What types of variables does an ANOVA examine?
Categorical explanatory variable and quantitative response variable
What does a parameter represent? What does a statistic represent?
population; sample
With what type of variables do you use a Pearson's Correlation for?
Quantitative explanatory variable and quantitative response variable
What are the different names for an explanatory variable?
Independent and predictor
What axis is the explanatory variable on?
X-axis
When a p-value is less than 0.05, is it significant?
Yes, there is a significant difference.
What does a Chi-Square test show us?
Observed data to expected data to see if the discrepancy is what we expected
What does the variability represent?
The spread of the data
When the standard deviation is smaller, what does this show?
Less variability in the data
What type of error is it...When a null hypothesis is true, but you reject it?
Type 1 error
How do you report the degrees of freedom?
(x,xxxx); i.e. (1, 3407)
What does the central tendency represent?
the center/average
Absolute value closest to 1
In the multivariate model, a response variable that is quantitative is called...
a multiple regression
What makes up a causal model?
An explanatory variable and response variable
When is a post-hoc test needed?
When a variable has multiple levels
What does the F statistic describe?
What does r2 represent?
In the multivariate model, a response variable is categorical and has two categories is called...
a logistical regression
Describe a between groups ANOVA
Amount of difference between different groups
Specify the hypotheses, specify the sample, assess the evidence, draw conclusions
What type of relationship between variables is displayed on a scatterplot?
quantitative and quantitative
The strength of a linear relationship between two variables is shown by...
a Pearson's correlation
Confounding variables must have a...
Significant correlation with explanatory variable and response variable
What type of error occurs when the null hypothesis is false, but is not rejected?
Type 2 error