STAT151 Lecture Notes - Standard Deviation, Minimax

• School: University of Alberta
• Department: Statistics
• Course: STAT151
• Professor: Paul Cartledge

Document Summary

Outlier is a data point that falls well above/below the bulk of the data. Median value of the midpoint of a ranked dataset (low to high; high to low) If there is an even # of datapoints, take the middle two and the average will be your median. Dataset: 3, 5, 7, 11, 20: median = 7. If the median is very different from the population mean, there are probably outliers. *** note: knowing the shape of the graph will allow you to find the relationship between the mean and median but knowing just the mean and median"s relationship to each other does. Not allow you to determine the shape of the graph. Mode most frequent value in a data set (the highest peak in a graph) Range (largest value smallest value) or (max-min) Standard deviation typical deviation from the mean; calculated from the variance (for population = ; for sample = s)