2-3

Question 1

descriptive statistics

Answer 1

the listing and summarizing of data in a practical efficient way

Question 2

frequency distribution

Answer 2

an arrangement of data that indicates how often a particular score or observations occurs

Question 3

normal curve

Answer 3

a graph of frequency distribution shaped like a symmetrical bell-shaped curve a graph of normally distributed data

Question 4

central tendency

Answer 4

a number that describes something about the average score of a distribution

Question 5

variability

Answer 5

a measure of difference or spread of data

Question 6

standard deviation

Answer 6

a measure of variability that describes an average distance of every score from the mean

Question 7

describes the direction and strength of the relationship between two variables

Answer 7

correlation coefficient

Question 8

numerical methods used to determine wether research data support a hypothesis or wether results were due to a chance

Answer 8

inferential statistics

Question 9

statistics

Answer 9

the branch of mathematics concerned with summarizing and making meaningful inferences from collections of data.