Chap 9 T Tests Flashcards Preview

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Flashcards in Chap 9 T Tests Deck (14):
1

Categorical (nominal)

When variables are measured using categories or names.

2

Continuous ( intervally scaled)

When variables are measured using numbers along a continuum with equal distances or values, b/w each number along the continuum.

3

Dependent Variable

A variable for which the values may depend on the independent on , or differ by, the independent variable. When the dependent variable is statistical related to the independent variable, the value of the dependent variable " depends" on, or is predicted by the value of the independent variable.

4

Dependent, or paired, samples test test

A test of statistical similarity b/w the means of two paired, or dependent samples.

5

Independent Sample t tests

A test of statistical similarity b/w the means of 2 independent samples on a single variable.

6

Independent Variable

A variable that may predict or produce variation in the dependent variable. The independent variable may be nominal or continuous and is sometimes manipulated by the the researcher. ( e.g. when the researcher assigns participants to an experimental of control group, thereby creating a two - category independent variable)

7

Matched, paired, dependent samples

When each score from one sample is matched from one score from a second sample. Or in the case of single sampled measured at 2 times, when each score at Time 1 is matched with the score for the same individual at Time 2.

8

Matched, paired, dependent samples t tests

Test comparing the means of paired, matched, or dependent samples on a single variable.

9

Significant

Shortened for of the expression " statistically significant"

10

Standard error of the difference b/w the means

A statistic indicating the standard deviation of the sampling distribution of the difference b/w the means.

11

t

The t value = comparing 2 means to see if they are significantly different from each other.

12

df

Degrees of freedom

13

sD

The standard deviation of the difference b/w 2 dependent, or paired, sample means.

14

s_
D

The standard error of the difference b/w 2 dependent , or paired, sample means.