Tests Flashcards
What do we use the Z-test for?
Making a comparison between a sample and it’s population to see if it fits
In the Z-test, if |Z-Calc| > Z-crit, we accept…
H₁
What do we use the T-test for?
Making a comparison between a sample and it’s population, where the sample is less than 30 (n<30)
In the T-test, if |T-calc| > T-crit, we accept…
H₁
What do we use the Z proportion test for?
Comparing populations with expected portions, to actual portions and seeing if they’re statistically different
In the Z proportion test, if |Z-calc| > Z-crit, we accept…
H₁
What do we use the Mann-Whitney U-test for?
For comparing two independent samples to each other, using ranks (ordinal data)
In the Mann-Whitney U-test, if the U-stat > U-crit, we accept…
H₀
What do we use Chi Squared for?
Evaluating categorical data of frequencies
In Chi Squared, if Chi-calc > Chi-crit, we must accept…
H₁
What is the F-test for?
Comparing if variances are statistically different
In the F-test, if S²₁ = S²₂, we must accept…
H₀
What is ANOVA used for?
Measures the variation between samples relative to the variation within the samples
What value do we find using ANOVA?
The F value
What is Pearson’s r used for?
Measures the variability between two datasets
