STA 2023 Lecture Notes - Lecture 11: Standard Deviation, Statistical Inference, List Of Longest Suspension Bridge Spans
Document Summary
The range is the difference between the highest and lowest values in a data set. The variance is the average of the squares of the distance each value is from the mean. The standard deviation is the square root of the variance. The standard deviation is a measure of spread of data. To determine the spread of the data. To determine the consistency of a variable. To determine the number of data values that fall within a specified interval in a distribution (cid:523)chebyshev"s theorem(cid:524) The coefficient of variation is the standard deviation divided by the mean, expressed as a percentage. Use cvar to compare standard deviations when the units are different. The lengths (in feet) of the main span of the longest suspension bridges in the. United states and the rest of the world are shown below. United states: 4205, 4200, 3800, 3500, 3478, 2800, 2800, 2310.
