exam 2

Question 1

estimated standard error of the mean

Answer 1

estimated sd of sample

Question 2

one sample t test

Answer 2

tool that allows us to learn whether a sample differs from the population from which it is drawn when sd is not known

Question 3

independent t test

Answer 3

tool that compares means of two mutually exclusive groups

Question 4

between subject design

Answer 4

experimental design in which participants are randomly assigned to one and only one experimental group

Question 5

standard error of the difference between the means

Answer 5

standard deviation of a difference between two groups

Question 6

effect size

Answer 6

measure of how powerful relationship between variables is

Question 7

confidence interval

Answer 7

interval estimate that contains the population mean a certain percentage of time based on repeated sampling of that population

Question 8

paired sample t test

Answer 8

comparing two means derived from same sample

Question 9

within subject design

Answer 9

research where participants answer two questions, the answers to which will be compared

Question 10

difference score

Answer 10

number that is the difference between a person performance in one experimental condition and his or her performance in a second experimental condition

Question 11

standard error of the difference scores

Answer 11

sd of mean difference scores within a sample

Question 12

conditions/ values/ levels

Answer 12

term used to denote the number of groups in an experiment

Question 13

bonferroni adjustment

Answer 13

dividing .05 alpha by the number of statistical comparisons being made, this controls the chance of making a type 1 error

Question 14

family-wise type 1 error

Answer 14

likleyhood of detecting at least on statistically significant result when conducting multiple statistical tests. called family wise because it is error rate for a series of statistical tests

Question 15

Anova

Answer 15

tool used to compare means of three or more groups

Question 16

one way anova

Answer 16

between subjects, one independent variable and each participant is assigned on experiment level

Question 17

error variance

Answer 17

amount of variability between scores resulting from uncontrolled variables

Question 18

within group variability

Answer 18

amount of variability between scores winthin each experimental group

Question 19

grand mean

Answer 19

all scores averaged

Question 20

between group variability

Answer 20

amount of variability between scores across groups

Question 21

partial eta squared

Answer 21

effect size in anova

Question 22

tukey HSD post hoc test

Answer 22

procedure used after an f ratio is calculated. this procedure allows us to learn which group means are significantly different from one another