Statistical Test Table (Inferential Statistics Pt2)

Question 1

What three things do you need to know before deciding on a statistical test?

Answer 1

• whether it is a test of difference (finding difference between two conditions) or a test of correlation (finding relationship between two variables)
• The level of measurement (e.g. nominal, ordinal, interval)
• The type of design (e.g. whether it is repeated measures/matched design or independent measures)

Question 2

• test of correlation
• ordinal data

Answer 2

Spearman’s Rho statistical test

Question 3

• test of correlation
• interval data

Answer 3

Pearson Correlation

Question 4

• test of difference
• ordinal data
• repeated measures design or matched pairs

Answer 4

Wilcoxon Statistical test

Question 5

• test of difference
• interval data
• repeated measures or matched pairs

Answer 5

Related T-test

Question 6

Calculating df (degrees of freedom) in RELATED T-test:

Answer 6

Df = (N) -1

Question 7

• test of difference
• interval data
• independant measures

Answer 7

Independant T-test

Question 8

Calculating df (degrees of freedom) in INDEPENDANT T-test:

Answer 8

Df = (N1 + N2) -2

Question 9

• test of difference
• nominal data
• independent measures design

Answer 9

Chi Squared (X2) Statistical test

Question 10

Finding Df for chi-squared test:

Answer 10

• look at your table, count number of rows and number of columns
• Df = (number of rows -1) x (number of columns -1)

Question 11

• test of difference
• ordinal data
• independant measures design

Answer 11

Mann Whitney (U) Statistical test

Question 12

How to write the findings using what you read from the table:

Answer 12

At a significance level of p ≤0.05 for a _____tailed test, N=_____ and df = ________
The observed value (____) is less/more/equal to the critical value (___) Therefore we accept the null/alternate hypothesis and reject the null/alternate because findings are significant/non significant