stats

Question 1

what does a P value of p

Answer 1

if the null hypothesis were true, the probability of obtaining results as or more extreme than those obtained = 0.05

Question 2

We can either reject the null hypothesis, OR?

Answer 2

Fail to reject the null hypothesis

Question 3

SMALL P values indicate what?

Answer 3

strong evidence AGAINST our NULL hypothesis

ie more likely that our value is significant

Question 4

Z scores:

- if the z score is negative: which one used to find amount HIGHER than raw score

Answer 4

The INITIAL score found on the cum freq table. i.e before you minus it for being a negative number

Question 5

Z scores:

- if the Z score is negative and want to find what is LOWER ?

Answer 5

1 - the z score

Question 6

Z scores: if positive z score:

• which one for higher than?
• which one for lower than?

Answer 6

Higher =  1 - Z score 
Lower = the initial score found on the cum freq table

Question 7

Degrees of freedom: Paired samples T

Answer 7

n-1

Question 8

Degrees of freedom: Independent T

Answer 8

(N1 - 1) + (N2 - 1)

Question 9

Degrees of freedom: Chi squared

Answer 9

(No. of rows - 1) x ( No. of columns - 1)

Question 10

Degrees of freedom: ANOVA

Answer 10

a) WITHIN groups:
(No. of ppts in group - 1) x No. of groups
b) BETWEEN groups
No. of groups - 1