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175.203 Psychological Research > Equations > Flashcards

Flashcards in Equations Deck (10):
1

Mean

2

Variance

3

Standard deviation

4

t-test

5

Effect size

6

Z Score.

The observed difference divided by the expected difference in a single score from a sample or population.

7

Reverse z score

to get a sample score from a z-score

8

Standard Error of Mean

Indicates the amount the sample mean will deviate from the population mean.

As N gets bigger the SEM gets smaller.

Larger samples estimate the population mean better.

Larger samples = Lower standard error of mean

9

The chi-square test is used when dealing with nominal data.

Where O is the observed frequency in each cell, E is the expected frequency in each cell, and the symbol sigma refers to summing over all cells.

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