Chap 9 T Tests

Question 1

Categorical (nominal)

Answer 1

When variables are measured using categories or names.

Question 2

Continuous ( intervally scaled)

Answer 2

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

Question 3

Dependent Variable

Answer 3

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.

Question 4

Dependent, or paired, samples test test

Answer 4

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

Question 5

Independent Sample t tests

Answer 5

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

Question 6

Independent Variable

Answer 6

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)

Question 7

Matched, paired, dependent samples

Answer 7

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.

Question 8

Matched, paired, dependent samples t tests

Answer 8

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

Question 9

Significant

Answer 9

Shortened for of the expression “ statistically significant”

Question 10

Standard error of the difference b/w the means

Answer 10

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

Question 11

t

Answer 11

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

Question 12

df

Answer 12

Degrees of freedom

Question 13

sD

Answer 13

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

Question 14

s_

D

Answer 14

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