Module 3

Question 1

mode

Answer 1

the most frequently occurring score in a distribution

Question 2

mean

Answer 2

the arithmetic average of a distribution, half the scores are above the median and half the scores below the median

Question 3

range

Answer 3

the difference between the highest and lowest scores in a distribution

Question 4

standard deviation

Answer 4

a computed measure of how much scores vary around the mean score

Question 5

normal curve

Answer 5

a symmetrical bell-shaped curve that describes the distribution of many types of data; most scores fall near the mean

Question 6

statistical significance

Answer 6

a statistical statement of how likely it is that an obtained result occurred by chance

Question 7

variable

Answer 7

anything that can vary and is feasible and ethical to measure

Question 8

variance

Answer 8

the measure of a spread, or dispersion of the scores within a sample or population

Question 9

correlation

Answer 9

a measure of the extent to which two factors vary together and thus of how well either factor predicts the other

Question 10

regression

Answer 10

the way we relate dependent variables to independent variables in a study

Question 11

sample size

Answer 11

the number of people in a group

Question 12

population

Answer 12

all those in a group being studied, from which random samples may be drawn

Question 13

sampling bias

Answer 13

the collection of samples that do not accurately represent the entire group