FINAL - data analysis: inferential

Question 1

inferential statistics

Answer 1

test how likely it is that the study findings represent the population

Question 2

sampling error

Answer 2

errors that can happen, even if random selection occured

Question 3

alpha .05

Answer 3

probability of error is 5/100
95% confidence

Question 4

alpha .01

Answer 4

probability of error is 1/100
99%

Question 5

alpha .001

Answer 5

probability of error is 1/1000
99.9%

Question 6

p value

Answer 6

probability of rejecting the null hypothesis
what is the likelihood that your results are due to sampling error?
used in determining if results are considered “statistically significant”

Question 7

which would be more likely to be used with a directional hypothesis?

Answer 7

one tailed test

Question 8

type II error

Answer 8

failure to reject the null hypothesis
often caused by the study not having enough power to find statistically significant results
mainly controlled through planning/follow through of study

Question 9

correlation coefficient

Answer 9

r
parametric

Question 10

when determining relationships, need to look at:

Answer 10

strength of relationship
direction of relationship
statistical significance of relationship

Question 11

you cannot tell cause/effect based on

Answer 11

correlations

Question 12

WEAK RELATIONSHIP

Answer 12

0.3-0.5

Question 13

MODERATE RELATIONSHIP

Answer 13

0.51-0.85

Question 14

STRONG RELATIONSHIP

Answer 14

0.86-0.95

Question 15

positive r

Answer 15

both variables change in the same direction

Question 16

negative r

Answer 16

variables change in different directions

Question 17

t test

Answer 17

analyzing differences between 2 groups/conditions

Question 18

ANOVA

Answer 18

analyzing differences for MORE THAN 2 groups/conditions

Question 19

parametric tests

Answer 19

independent tests
paired t test
z test

Question 20

nonparametric tests

Answer 20

mann-whitney U
sign test
wilcoxin matched-pairs signed-rank test

Question 21

one way designs

Answer 21

one way analysis of variance (ANOVA)
repeated measures ANOVA

Question 22

factorial designs

Answer 22

two way analysis of variance
mixed model analysis of variance