Ch 12

Question 1

Ordinal scale

Answer 1

Levels exhibit minimal quantitive distinction first second third scale rank

Question 2

Interval scale

Answer 2

The intervals between the levels are equal in size there is no absolute zero point

Question 3

Ratio scale

Answer 3

Both have equal intervals and an absolute zero time weight length

Question 4

Frequency distribution

Answer 4

Indicate the number of individuals who receive each possible score on a variable

Question 5

Frequency polygon

Answer 5

Use a line to represent the distribution of frequencies of scores

Question 6

Histogram

Answer 6

Uses bars to display a frequency distribution for a quantitative variable

Question 7

Descriptive statistics

Answer 7

Allows researchers to make precise statements about data and two numbers summarize the information contained in a frequency distribution

Question 8

Central tendency

Answer 8

Tells us what the sample as a whole or on the averages like mean median and mode

Question 9

Mean

Answer 9

Only used one scores are measured on an interval or ratio scale

Question 10

Median

Answer 10

Appropriate when scores are on an ordinal scale

Question 11

Mode

Answer 11

Mode is the only measure of central tendency that is appropriate if nominal scale is used

Question 12

Variability

Answer 12

A number that here during the amount of spread in a distribution of scores

Question 13

Standard deviation

Answer 13

Indicates the average deviation of scores from the mean

Question 14

Variance

Answer 14

Standard deviation is the square root of variance

Question 15

Range

Answer 15

Difference between highest and lowest score

Question 16

Correlation coefficient

Answer 16

A statistic that describes how strongly variables are related to one another

Question 17

Pearson product moment

Answer 17

Used in both variables have interval or ratio scale provides info about the strength the relationship and the direction of the relationship

Question 18

Restriction of range

Answer 18

Occurs when the individuals in your sample are very similar on the variables you are studying

Question 19

Effect size

Answer 19

Refers to the strength of association between variables

Question 20

Regression equation

Answer 20

Calculations used to predict a person score on one variable with that person score on another variable is already know

Question 21

Criterion variable

Answer 21

When researchers are interested in predicting some future behavior

Question 22

Predictor variable

Answer 22

Maybe basis of a person score on some other variable

Question 23

Multiple correlation

Answer 23

Used to be combined in number of predictor variables to increase the accuracy of prediction of a given criterion or outcome variable

Question 24

Partial correlation

Answer 24

Provides a way of statistically controlling third variables

Question 25

Structural equation modeling

Answer 25

Examine models that specify a set of relationships among variables using quantitive or non-quantitive methods

Question 26

Nominal scale

Answer 26

Variables that have no numerical quantitative properties