1-4

Question 1

What are the levels of measurement

Answer 1

nominal
ordinal
interval
ratio: zero point

Question 2

histograms

Answer 2

graph with class intervals

Question 3

graph with class intervals

Answer 3

histograms

Question 4

frequency distribution

Answer 4

An orderly arrangement of a group of numbers (or test scores) showing the number of times each score occurred in a distribution

Question 5

An orderly arrangement of a group of numbers (or test scores) showing the number of times each score occurred in a distribution

Answer 5

frequency distribution

Question 6

normal curve, properties of

Answer 6

theoretical distribution

prop: 34.1%, 13.6%, 2.1%

Question 7

mean

Answer 7

average, get’s pulled by skews

Question 8

average, get’s pulled by skews

Answer 8

mean

Question 9

median

Answer 9

middle score in a group of scores

prefer this when skewed

Question 10

middle score in a group of scores

Answer 10

median

prefer this when skewed

Question 11

mode

Answer 11

most common score in a distribution

Question 12

most common score in a distribution

Answer 12

mode

Question 13

what are the measures of variability?

Answer 13

range, variance, standard deviation

Question 14

range

Answer 14

the highest score in a distribution minus the lowest score in a distribution.

Question 15

the highest score in a distribution minus the lowest score in a distribution.

Answer 15

range

Question 16

variance

Answer 16

individual scores tend to be similar to or substantially different from the mean

it measures how far a set of numbers are spread out from their average value

Question 17

individual scores tend to be similar to or substantially different from the mean

it measures how far a set of numbers are spread out from their average value

Answer 17

variance

Question 18

standard deviation

Answer 18

A measure of variability that represents the degree to which scores vary from the mean.

Question 19

A measure of variability that represents the degree to which scores vary from the mean.

Answer 19

standard deviation

Question 20

T scores

Answer 20

help us understand how many standard deviations an individual test score is above or below the distribution mean.

always have a mean of 50 and a standard deviation of 10

enables you to take an individual score and transform it into a standardized form one which helps you to compare scores.

Question 21

help us understand how many standard deviations an individual test score is above or below the distribution mean.

always have a mean of 50 and a standard deviation of 10

enables you to take an individual score and transform it into a standardized form one which helps you to compare scores.

Answer 21

t score

Question 22

standard deviation units

Answer 22

how many standard deviations an individual score falls away from the mean

units below the mean are represented with a negative (−) sign.

mean always has a standard deviation unit of 0

Question 23

how many standard deviations an individual score falls away from the mean

units below the mean are represented with a negative (−) sign.

mean always has a standard deviation unit of 0

Answer 23

standard deviation units

Question 24

z score

Answer 24

helps us understand how many standard deviations an individual test score is above or below the distribution mean

mean = 0

1 is always 1 standard deviation above the mean

−1 is always 1 standard deviation below the mean

Question 25

helps us understand how many standard deviations an individual test score is above or below the distribution mean

mean = 0

1 is always 1 standard deviation above the mean

−1 is always 1 standard deviation below the mean

Answer 25

z score