Statistics

Question 1

What is the students t-test?

Answer 1

Describes the difference between 2 means using a number
Used to calculate and interpret t-value for 2 means

Question 2

What are the limitations of the value?

Answer 2

Can only be used to compare mean of 2 independent data sets
Only appropriate if data has no outliers or skew

Question 3

What is the chi-squared (X²) test?

Answer 3

Used to measure the observed and expected results
When X² = 0 there is no difference, when X² > 0 there is some difference

Question 4

What kind of data can chi-squared be calculated for?

Answer 4

Categorical
Numerical, non-numerical

Question 5

What is the Spearman’s rank test?

Answer 5

Tells us whether there is a significant correlation between two sets of data

Question 6

What is standard deviation?

Answer 6

A statistical test that tells us how varied the data is, or the spread from the mean
Low= values closely grouped around mean, more reliable data
High= larger range