wk7

Question 1

between subjects t-test

Answer 1

one dv
one iv
two groups of participants tested once

Question 2

independent t-test assumptions

Answer 2

• normally distributed data for both groups
• homogenity of variance across the groups (variances should be similar)
• Data should be either interval or ratio

Question 3

Systematic variation

Answer 3

The variation that can be explained by our manipulation

Question 4

unsystematic variation

Answer 4

Variation that cannot be explained by our manipulation

Question 5

Test statistic equation

Answer 5

systematic variation / unsystematic variation = effect/error

Question 6

To calculate an independent t-test

Answer 6

1) calculate descriptive statistics
2) identify whether the data meets the assumptions of parametric statistics
3) calculate the T value
4) identify whether the result is significant
5) reject or fail to reject the null hypothesis

Question 7

homogeneity of variance

Answer 7

divide s.d by each other. if value is less than four we have achieved homogeneity of variance.

Question 8

degrees of freedom

Answer 8

The number of individual scores that can vary without changing the sample mean

Question 9

degrees of freedom calculation for independent T test

Answer 9

(n1-1)+(n2-1)

Question 10

critical values table for independent t-test

Answer 10

if the T value is greater than that included in your critical table your result is significant

Question 11

paired t-test

Answer 11

one dv
one iv (2conditions)
one group tested twice

Question 12

calculate paired t-test

Answer 12

1) calculate the descriptive statistics
2) identify whether the data meets the parametric assumptions
3) calculate the T value
4) identify whether there is significant
5) reject or fail to reject the null hypothesis