statistics in psychology

Question 1

what happens in a quasi experiment

Answer 1

-the two groups already exist eg introverts and extroverts

-collect DV measurements under the 2 conditions for both groups

-control everything else

-compare the DV measurements

Question 2

what are descriptive statistics

Answer 2

-techniques used for summarising data so we can focus on the important features by reducing the amount of info we’re taking in at once (2 numbers;CENTRAL TENDANCY AND DISPERSION)

Question 3

What is central tendency

Answer 3

an average that tells us what is TYPICAL about the set of scores as it focuses on the typical person in the condition/group (mean median mode)

Question 4

what is dispersion

Answer 4

it is s spread that tells us how typical the central tendency is by telling us how the data is spread out (VARIABILITY) looks at the range and standard deviation

Question 5

PRACTICE CALCULATING SD AND MEAN

Question 6

what are inferential statistics

Answer 6

Analysis of data to determine whether or not the result of mere chance or are actually the result of manipulation of the variables by the researcher.

Question 7

what is a test of difference

Answer 7

tells us about the size and consistency of the differences between measurements in 2 different conditions

Question 8

what can we conclude about what is shown in a test of difference

Answer 8

-large, consistent differences are unlikely to be caused by chance

-small, inconsistent differences are likely to be caused by chance

Question 9

what test do you use for an independent group design

Answer 9

Mann-Whitney U Test

Question 10

what test do you use for a repeated measures design

Answer 10

WIlcoxon Signed Ranks Test

Question 11

PRACTICE WC AND MWU TEST