Statistics 1

Question 1

What is a parametric test

Answer 1

A test used when the data is parametric (something which can be normally measured, usually normally distributed)

Question 2

What is a non-parametric test

Answer 2

Used when data is non-parametric - cannot be assumed to be following a normal distribution

Question 3

Example of parametric test

Answer 3

T-test. Pearsons product-moment coefficient

Question 4

Example of non-parametric tests

Answer 4

Mann-Whitney U test - unpaired data
Wilcoxon signed-rank test - compares two sets of observations on a single sample
Chi-squared test - used to compare proportions or percentages
Spearman, Kendall rank - correlation