Chp 3 (3.1 & 3.2) "Vocab"

Front

Multiply midpoints by frequencies, sum, then divide by n.

Back

Mean of a grouped frequency distribution

Front

Subtract mean from midpoints, square differences, multiply by frequency, sum, divide by (n - 1).

Back

How to calculate sample variance of grouped frequency distribution.

Front

Find the variance and take the square root of it.

Back

How to calculate ANY standard deviation

Front

Shows data spread; square of standard deviation.

Back

Definition of variance

Front

Shows how far data is spread from the mean

Back

Definition of Standard Deviation

Front

Graph of vertical bars showing frequency distribution.

Back

Histogram

Front

Middle number in a frequency distribution.

Back

Midpoint

Front

Data that are evenly distributed.

Back

symmetric

Front

Tail on the left; mean < median.

Back

Left skewed

Front

Tail on the right; Median < Mean.

Back

Right skewed