STAT-2300 Lecture Notes - Lecture 3: Standard Score, Standard Deviation, Box Plot

• School: Clemson University
• Department: Experimental Statistics
• Course: STAT-2300
• Professor: Christy Brown

Document Summary

Shape: mention any symmetry of skewness , number of peaks, clusters, or gaps and any unusually high or low observations (outliers) Center: describes a typical or representative data value. Spread: variability of data or the degree to which the data values are either clustered together or spread out. Range, variance, standard deviation and interquartile range. Mean: sum of the observations divided by the number of observation. Median: middle observation when the observations are listed in order. Resistance of data: if extreme observations have little influence on the values in the data. Shape of distribution influence whether mean is larger or smaller than the median. If distribution is highly skewed = median is preferred. If distribution is symmetric = the mean is preferred. Measure of center does not indicate amount of dispersion. Standard deviation (s): represents a typical value for how far data will fall from the mean (cid:884) Value of s is always greater than or equal to 0.