Exam Review Day 6Chapters 2 and 3

Statistics of One Variable and Statistics of Two Variable

1 Variable Statistics

Things you need to remember:• How to draw a histogram• How to draw a frequency graph• How to draw a cumulative frequency graph

Sampling

Things you need to remember about sampling:• The difference between a population and a

sample• Sampling techniques (simple random

sampling, systematic sampling, etc.)• Bias in sampling (measurement bias, non-

response bias, etc.)

Measures of Central Tendency

Measures of Central Tendency • Mean• Median• Mode• Outliers - big effect on mean in small sample

Weighted Mean

Measures of Spread

Measures of Spread • Interquartile range• Standard deviation• Variation

Box and Whisker Plot

2 Variable Statistics

Things you need to remember:• Scatter plots and line of best fit• Correlation coefficient, r

Line of Best Fit

Using the method of least squares

y=ax+b

Types of Non-Linear Regressions

Types of non-linear regression:• Exponential Regression• Quadratic Regression• Cubic Regression• Quartic Regression Strength of non-linear regression:• Coefficient of Determination, r2

Cause and Effect Relationships and Critical Analysis

• Types of cause and effect relationships (accidental, presumed, etc.)

• Be able to analyze relationships and think critically