Methods Stats

Question 1

How did you find out the data is normally distributed?

Answer 1

Shapiro test

Sig greater than 0.05

Ind t test = mann whitney U
Non para anova = Friedman test

Question 2

What is a two way between groups ANOVA?

Answer 2

Compare the effect of the two IV’s on the DV

It also studies the interrelationship between IV’s affecting influencing the DV

IV = group, limb side
DV = hip rom

Question 3

What is power?

Answer 3

The probability of detecting an effect, if there is a true effect to detect

Question 4

Type 1 error

Answer 4

False positive (finding an effect, when there is not a true effect)

Question 5

Type 2 error

Answer 5

False negative (Not finding an effect, when there is an effect)

Question 6

Sample size calculation

Answer 6

A priori sample size calculation
G Force
Effect size, sig level, power, groups etc.

Question 7

Why did you not do multiple t-tests?

Answer 7

As the number of t-tests increase, the probability of getting a type 1 error increases

Question 8

Assumptions of a 2 way anova

Answer 8

Normall distributed
DV is continuous
2 categorical IV’s

Question 9

What does higher DF mean?

Answer 9

More chance of having a higher power,

meaning more chance of rejecting the null hypothesis and finding a significant effect