MATH 106 Lecture Notes - Lecture 3: Quartile, Skewness
Document Summary
Audio recording started: 9:56 am thursday, february 4, 2016. Mean or average: sum up numbers and divide by the number of numbers. Weights = coefficients that account for how many times a number is present in the data. Median: number in the middle (aka 50th percentile) If there are two medians take the average of them. Mode: most frequently recurring numbers in the data set. Mean: in normal distribution mean == mode == median. First quartile is the median of the lower half of the data, and the third quartile is the median of the upper half of the data. Excel: quartile. exc(cell range or list,1) #if you pit a 2 you will get the median. Excel: quartile. exc(cell range or list,3) #if you put a 2 you will get the median. L is for the location of the pth percentile. Five number summary: min, first quartile, median, 3rd quartile, max.
