7 Testing For Differences Between Groups

Question 1

Type 1 error

Answer 1

Detecting an effect that isn’t present

Question 2

Type 2 error

Answer 2

Failing to detect an effect that is present

Question 3

P>0.05

Answer 3

Stick to null hypothesis (no relationship)

Question 4

P<=0.05

Answer 4

Accept alternative hypothesis

Question 5

One sample t test

Answer 5

One variable

Ordinal/interval/ratio

Question 6

Independent sample t test

Answer 6

Two variables

Nominal by ordinal/interval/ratio

If t value <1.89 = not statistically significant

Lavines test significance <0.05 = not significant

Question 7

Chi square

Answer 7

Two variables

Nominal by nominal

Adjusted standardised coefficients need to be >= 2 to designate cells with significant differences

Question 8

Paired sample t test

Answer 8

2 variables

Nominal by ordinal/interval/ratio

Test if difference in similar ratings for same respondent

Question 9

ANOVA

Answer 9

2+ variables

Nominal by ordinal/interval/ratio

Check ANOVA sig table first

If Lavines >0.05 look at bon Feroni table