Module 4: Statistical Reading in Everyday Life Flashcards Preview

A.P. Psychology > Module 4: Statistical Reading in Everyday Life > Flashcards

Flashcards in Module 4: Statistical Reading in Everyday Life Deck (15):
1

big, round, "nice" numbers should be

doubted

2

precise numbers are

more credible

3

graphs can be misleading because

scales can be manipulated to make differences seem greater

4

measure of central tendency

single score that represents a whole set of scores

5

mode

most frequently occuring score

6

mean

arithmetic average

7

median

middle score

8

range

gap between lowest and highest scores

9

smaller range implies

higher reliability

10

large range means

less reliability OR
few extremes in an otherwise uniform group

11

standard deviation

computed measure of how much scores vary around the mean score

12

standard deviation =

sq. root [ (sum of deviations)^2 / # of scores ]

13

normal curve

symmetrical, bell-shaped curve that describes distribution of many types of data
most scores fall near the mean, fewer and fewer towards extremes

14

when is an observed difference significant?

if averages from samples are reliable measures of respective populations
larger difference, more likely to be true

15

statistical significance

statistical statement of how likely it is that an obtained result occurred by chance
indicates likelihood of result, not importance