STAT-UB 103 Chapter Notes -List Of Statistical Packages, Observational Error, Random Variable

• School: New York University
• Department: Statistics & Operations Research
• Course: STAT-UB 103
• Professor: Ardeshir Shahmaei

Document Summary

: or for probability (set union), : and for probability (set intersect) Standard deviation: : mean, median, mode measure central tendency of data. 99. 7% is within 3: histograms illustrate frequency distribution. Optimal number of classes: such that , where is the size of data. Label the midpoint of each class on the -axis and have no gaps between classes. Used to find skewedness, outliers, and bimodal distributions: quartiles. , i. e. rounded down to the previous integer . , i. e. rounded up to the next integer . Draw box with leftmost , rightmost and a vertical line at. Draw horizontal line extending from to the largest , mark with solid circle. Draw horizontal line extending from to the smallest , mark with solid circle. Any outside of is an outlier and is drawn with an x: a sample is left skewed if more points are to the right of the mean.