Data Handling and Analysis

When to use a bar chart

For categorical data where the study is an experiment comparing groups

When to use a histogram

For continuous, frequency data in numeric ranges

When to use a scattergram

When studying a correlation between two continuous variables

When to use a line graph

For continuous data studying change over time

Standard deviation

a measure of the amount of variation from the mean

Where is the mode on a bell curve

the peak of the curve

Describe a positively skewed graph

Curve is slanted to the left, mean is on the right of the mode and the median is between both lines

Describe a negatively skewed graph

Curve is slanted to the right, mean is on the left of the mode and the median is between both lines

Conditional probability

The probability of an event if something else occurs