Choosing a statistical test?

Question 1

What factors decide which statistical test to use?

Answer 1

1. Difference or correlation
2. experimental design
3. level of measurement

Question 2

What are the experimental designs?

Answer 2

related = repeated measures, matched paires
unrelated = independent group design

in the table, unrelated is first

Question 3

Draw the table..

Answer 3

Unrelated Related Test of association
Nominal chi - squared sign chi - sqaured

Ordinal Mann - whitney wilcoxin Spearmans Rho

Interval Unrelated t - test Related t - test Pearsons R

Question 4

What is the acronym?

Answer 4

Carrots
Should
Come
Mashed
With
Swede
Under
Roast
Potatos

Question 5

What is nominal data?

Answer 5

• organised in categories
• discreete

Question 6

What is ordinal data?

Answer 6

• organised in a scale, no equal intervals
• lacks precision

Question 7

What is interval data?

Answer 7

• numerical scale
• defined, precise units
• for example, time and weight