PSYC 310 Ch 5

Question 1

Table with all of the scores listed along with the frequency with which each occurs

Answer 1

Frequency Distribution

Question 2

Table with scores grouped into intervals and listed along with the frequency of scores in each interval

Answer 2

Class Interval Frequency Distribution

Question 3

Categorical variable for which each value represents a discrete category

Answer 3

Qualitative Variable

Question 4

Graphical representation of a frequency distribution in which vertical bars are centered above each category along the x-axis and are separated from each other by a space, indicating that the levels of the variable represent distinct, unrelated categories

Answer 4

Bar Graph

Question 5

Variable with the scores representing a change in quantity

Answer 5

Quantitative Variable

Question 6

Graphical representation of a frequency distribution in which vertical bars centered above scores on the x-axis touch each other to indicate that the scores on the variable represent related, increasing values

Answer 6

Histogram

Question 7

Line graph of the frequencies of individual scores

Answer 7

Frequency Polygon

Question 8

Numerical measures that describe a distribution by providing information on the central tendency, width, and the shape of the distribution

Answer 8

Descriptive Statistics

Question 9

Number that characterizes the “middleness” of an entire distribution

Answer 9

Measure of Central Tendency

Question 10

Average

Answer 10

Mean

Question 11

Middle score in a distribution after the scores have been arranged from highest to lowest

Answer 11

Median

Question 12

Score in a distribution that occurs the most amount of times

Answer 12

Mode

Question 13

Number that indicates the degree to which scores are either clustered or spread out in a distribution

Answer 13

Measure of Variation

Question 14

Difference between the lowest and highest scores in a distribution

Answer 14

Range

Question 15

Average difference between the scores in the distribution and the mean or central point of the distribution; square root of the average squared deviation from the mean

Answer 15

Standard Deviation

Question 16

Indicates the average difference between the scores in a distribution and the mean of the distribution; alternative to SD

Answer 16

Average Deviation

Question 17

Standard Deviation Squared

Answer 17

Variance

Question 18

Symmetrical, bell-shaped frequency polygon representing a normal distribution

Answer 18

Normal Curve

Question 19

Theoretical frequency distribution that has certain special characteristics

Answer 19

Normal Distribution

Question 20

How flat or peaked a normal distribution is

Answer 20

Kurtosis

Question 21

Normal curves that have peaks of medium height and distributions that are moderate in breadth

Answer 21

Mesokurtic

Question 22

Normal curves that are tall and thin, with only a few scores in the middle of the distribution having a high frequency

Answer 22

Leptokurtic

Question 23

Normal curves that are short and more dispersed (broader)

Answer 23

Platykurtic

Question 24

Distribution with peak to the left of the center point, and the tail extends towards the right, or in the positive direction

Answer 24

Positively Skewed Distribution

Question 25

Distribution with peak to the right of the center point, and the tail extends toward the left, or in the negative direction

Answer 25

Negatively Skewed Distribution

Question 26

Number that indicates how many standard deviation units a raw score is from the mean of a distribution

Answer 26

Z-score (Standard Score)

Question 27

Normal distribution with a mean of 0 and a standard deviation of 1

Answer 27

Standard Normal Distribution

Question 28

Expected relative frequency of a particular outcome

Answer 28

Probability

Question 29

Dividing the squared deviation scores by N-1 rather than N, you are using ______ of the population standard deviation.

Answer 29

Unbiased Estimator

Question 29

Score that indicates the percentage of people who scored at or below a given raw score

Answer 29

Percentile Rank

Question 30

Interval & ratio

Answer 30

Mean

Question 31

Ordinal, interval, & ratio

Answer 31

Median

Question 32

Nominal, ordinal, interval, or ratio

Answer 32

Mode