Summarizing quantitative data videos

Statistics intro: Mean, median, & mode

Mean, median, & mode example

Comparing means of distributions

Means and medians of different distributions

Impact on median & mean: increasing an outlier

Impact on median & mean: removing an outlier

Missing value given the mean

Median & range puzzlers

Interquartile range (IQR)

Variance of a population

Measures of spread: range, variance & standard deviation

Population standard deviation

Statistics: Alternate variance formulas

Mean and standard deviation versus median and IQR

Sample variance

Sample standard deviation and bias

Why we divide by n - 1 in variance

Simulation showing bias in sample variance

Simulation providing evidence that (n-1) gives us unbiased estimate

Review and intuition why we divide by n-1 for the unbiased sample variance

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

Reading box plots

Constructing a box plot

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

Judging outliers in a dataset

Interpreting box plots

Range and mid-range

Mean absolute deviation (MAD)

Mean absolute deviation example