one way independant lec 1

Question 1

what does ANOVA stand for

Answer 1

analysis of covariance

Question 2

when is a t-test used

Answer 2

when there are less than 2 levels in one way indep groups

Question 3

what does ANOVA tells us

Answer 3

the probability of observing the pattern in the group when the null hypothesis is true

Question 4

what is variance also known as

Answer 4

sum of squares (ss)

Question 5

what is within subjects variance

Answer 5

random difference, not interested in

Question 6

what is between subjects variance

Answer 6

explained by membership of the experimental group, interested in it

Question 7

how do you calculate mean square within

Answer 7

SS / DF (no of participants - 1)

Question 8

how do you calculate mean square between

Answer 8

SS / DF (no of levels - 1)

Question 9

what is another name for within subjects variance

Answer 9

error variance

Question 10

how do you calculate the f value

Answer 10

MS between / MS within

Question 11

what type of test is ANOVA

Answer 11

inferential test

Question 12

how do you calculate variance (ss)

Answer 12

difference of score and mean 2 then all added up

Question 13

what is F value is close to one

Answer 13

there is no diference, about the same

Question 14

what is F value is close to 100

Answer 14

suggesting that there is ‘eg 99’ % variance between and that there is an effect so reject null hypothesis

Question 15

what is P value

Answer 15

the probability that f value occurring if the null hypothesis is true

Question 16

what would a p value of 0.001 suggest

Answer 16

there is 1 in 1000 chance to find an F value larger is the null hypothesis is trure. suggests that the hjull is probably not ture

Question 17

what happens if ANOVA is significant

Answer 17

post hoc test

Question 18

what does a post hoc tell us

Answer 18

how there is a difference

Question 19

what does a post hoc test do

Answer 19

compares each pair of condition means

Question 20

what does a post hoc test increase the chance of

Answer 20

type one error (false positive)

Question 21

what does a bonferroni correction do

Answer 21

splits the 5% chance of type one error across all of the post hocs

Question 22

what is the structure for writing up the analysis of a one way independant

Answer 22

study design, on what topic?
what did ANOVA reveal for the topic?
post hoc and explain bonferroni and its value
post hoc for first group
post hoc for second
post hoc for third
what do these test suggest for the topic?

Question 23

what row in SPSS relates to within variance

Answer 23

error

Question 24

what row in SPSS refer to between variance

Answer 24

below intercept, includes the two conditions… eg caffine_dose

Question 25

what does an SPSS value of .000 mean

Answer 25

p<.001

Question 26

what is the layout for the ANOVA result using SPSS table

Answer 26

f(DF1,DF2)= F, P=pvalue