Khan Academy

Interquartile range (IQR) (K-A)

Measures of spread: range, variance & standard deviation (K-A)

The idea of spread and standard deviation (K-A)

Interpreting box plots (K-A)

Judging outliers in a dataset (K-A)

Reading box plots (K-A)

Worked example: Creating a box plot (even number of data points) (K-A)

Worked example: Creating a box plot (odd number of data points) (K-A)

Frequency tables & dot plots (K-A)

Creating a histogram (K-A)

Interpreting a histogram (K-A)

Interquartile range (IQR) (K-A)

Estimating mean and median in data displays (K-A)

Median in a histogram (K-A)

Statistics intro: Mean, median, & mode (K-A)

Example: Comparing distributions (K-A)

Finding z-score for a percentile (K-A)

Standard normal table for proportion between values (K-A)

Standard normal table for proportion above (K-A)

Standard normal table for proportion below (K-A)

Threshold for low percentile (K-A)

Normal distribution problems: Empirical rule (K-A)

Qualitative sense of normal distributions (K-A)

Calculating percentile (K-A)

Comparing with z-scores (K-A)