Stats

Question 1

Quadratic curve equation

Answer 1

Y= cx2 + bx + a

Question 2

Parametric stats have to be what

Answer 2

N= >30
Normally distributed
Interval or ratio scale

Question 3

Non parametric stats have to be …

Answer 3

N = <30
Nominal or ordinal
Or interval and ration data that isn’t normally distributed

Question 4

Interval data definition

Answer 4

Data with no absolute zero point eg degrees Celsius, based on numerical scale, equal size

Question 5

Ratio data definition

Answer 5

Absolute zero such as %

Question 6

Nominal data definition

Answer 6

Data put in categories, no order

Question 7

Ordinal data definition

Answer 7

Data put in order, subjective rankings eg asking someone to rank how much they like something in 1-10

Question 8

Parametric tests to use when you’re testing difference

Answer 8

T test (1 sample and 2 sample) 
Analysis of variance (ANOVA)

Question 9

Parametric test to test relationship

Answer 9

Pearsons correlation (explanatory data, allows you to predict another variable)

Question 10

Non parametric tests to test difference

Answer 10

Chi squared
Mann Whitney test
Kruskal Wallis test

Question 11

Non parametric test to test relationship

Answer 11

Spearmans rank correlation