What is the first step in creating a frequency table?

Determine the range of scores (highest and lowest)

What is the second step in creating a frequency table?

Make a varible column of all values with highes at top, lowest at bottom

What is the third step in creating a frequency table?

Make a  frequency column that indicates how oftin each value occurs

Mean

Average of a group of scores

What is the formula for Mean?

M = Σx/N

Mean for sample is identified by?

       _

M or X

Mean for a population is identified by?

μ (mew)

Median

The score that divides a distribution exactly in half.

What is the formula to identify the Median?

(N/2) +0.5 = x^th score

Mode

The score that occurs the most often

Formula for deviation score

X - M

Formula for variance of a population

σ² = Σ(x-m)²

      _____

      N

Formula for variance of a sample.

SD² = Σ(x-m)²

      _____

      N

Formula for Sum of Squares (SS)

SS = Σ(X-M)²

Standard Deviation

Typical amount that scores in a sample vary from the mean.

Formula for Standar Deviation of a population

          ______ 

σ² = √Σ(x-m)²

      _____

      N

Formula for Standard Deviation of a sample.

            ______ 

SD² = √Σ(x-m)²

      _____

      N