Statistics intro: Mean, median, & modeMean, median, & mode exampleCalculating the meanChoosing the "best" measure of centerMean, median, and mode review

Comparing means of distributionsMeans and medians of different distributionsImpact on median & mean: removing an outlierImpact on median & mean: increasing an outlierMean as the balancing pointMissing value given the meanMedian & range puzzlers

Interquartile range (IQR)Comparing range and interquartile range (IQR)Interquartile range review

Measures of spread: range, variance & standard deviationVariance of a populationPopulation standard deviationThe idea of spread and standard deviationCalculating standard deviation step by stepMean and standard deviation versus median and IQRConcept check: Standard deviationStatistics: Alternate variance formulas

Sample varianceSample standard deviation and biasPopulation and sample standard deviation review

Why we divide by n - 1 in variance Simulation showing bias in sample varianceSimulation providing evidence that (n-1) gives us unbiased estimateUnbiased estimate of population varianceReview and intuition why we divide by n-1 for the unbiased sample variance

Worked example: Creating a box plot (odd number of data points)Worked example: Creating a box plot (even number of data points)Constructing a box plotReading box plotsInterpreting box plotsBox plot reviewJudging outliers in a datasetIdentifying outliers with the 1.5xIQR rule

Range and mid-rangeMean absolute deviation (MAD)Mean absolute deviation exampleMean absolute deviation (MAD) review