# Statistics Lectures - 5 (Variance & Percentiles)

A series of free Statistics Lectures & solutions in videos.

These lectures cover the concepts of variance, standard deviation, quartiles, percentiles, interquartile range and discuss the effects of outliers.

Variance, standard deviation and interquartile range are measures of dispersion, giving a idea of how the data is spread out.

Related Topics:
Statistics.

This is the fifth page of the series of free video lessons, "Statistics Lectures".

### Statistics - Lecture 11

Variance and Standard Deviation of a Population

### Statistics - Lecture 12

Variance and Standard Deviation of a Sample

### Statistics - Lecture 13

Percentiles and Quartiles

### Statistics - Lecture 14

The Five Number Summary, Interquartile Range (IQR), and Boxplots

### Statistics - Lecture 15

The Effects of Outliers

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