Equations

Question 1

Mean

Answer 1

Question 2

Variance

Answer 2

Question 3

Standard deviation

Answer 3

Question 4

t-test

Answer 4

Question 5

Effect size

Answer 5

Question 6

Z Score.

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

Answer 6

Question 7

Reverse z score

to get a sample score from a z-score

Answer 7

Question 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

Answer 8

Question 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.

Answer 9