Chapters 7,8,9

Question 1

normal curve

Answer 1

a graphic picture of the bell-shaped normal distribution

Question 2

normal distribution

Answer 2

most of the scores are clustered around the middle, around the mean/median/mode with the frequency of the other scores gradually lessening on either side

Question 3

percentile

Answer 3

scores that has a certain percentage of scores below it

Question 4

quartiles

Answer 4

raw scores that divide the distribution into four equal parts

Question 5

scatterplot

Answer 5

the graph plotted with values for two variables that are being compared

Question 6

correlation coefficient

Answer 6

way to measure the relationship between two variables

Question 7

covariance

Answer 7

a number that represents the degree to which two different variables change together

Question 8

critical value

Answer 8

a numerical value that is used as a decision point

Question 9

degrees of freedom

Answer 9

equal to n minus 2

Question 10

coefficient of determination

Answer 10

part of the variance of one variable that can be explained by, or attributed to, the variance of a related variable

Question 11

regression coefficient

Answer 11

the values of a and b

Question 12

regression line

Answer 12

diagonal line on a graph that was plotted from a regression equation

Question 13

standard error of the estimate

Answer 13

standard deviation of the actual values of a variable from the predicted variables