Ch. 2 Flashcards

0
Q

nominal scales

A

classify people or objects into categories, classes or sets.

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1
Q

measurement

A

set of rules for assigning numbers to represent objects, traits, attributions, or behaviors.

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2
Q

ordinal scale

A

rank people or objects according to the amount of a characteristics they display or possess.

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3
Q

interval scales

A

rank people or objects like an ordinal scale but on a scale of equal units.

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4
Q

ratio scales

A

have the properties of interval scales plus a true zero point.

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5
Q

distribution

A

is a set of scores.

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6
Q

mean

A

the arithmetic average of a distribution.

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7
Q

median

A

is the score of potential score formerly referred to as the “point” that divides the distribution in half.

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8
Q

mode

A

is the most frequently occurring score in a distribution.

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9
Q

range

A

is the distance between the smallest and the largest score in a distribution.

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10
Q

standard deviation

A

is the measure of the average distance that scores vary from the mean of the distribution.

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11
Q

variance

A

is the measure of variability that has special meaning as a theoretical concept in measure theory and statistics.

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12
Q

normal distribution

A

is a symmetrical unimodal distribution in which the mean, median and mode are all equal.

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13
Q

correlation coefficient

A

a correlation coefficient is a quantitive measure of the relationship between two variables.

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14
Q

coefficient of determination

A

is interpreted as the amount of variance shared by two variables.

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15
Q

scatterplot

A

is a graph that visually displays the relationship between two variables.

16
Q

linear regression

A

is a mathematical procedure that allows you to predict values on one variable given information on another variable.