STA 2023 Lecture Notes - Lecture 6: Mena, Unimodality, United States Census Bureau
Document Summary
Knowing the average of a data set is not enough to describe the data set entirely. Even though a shoe store owner knows that the average size of a man"s shoe is size. 10, she would not be in business very long if she only ordered size 10 shoes. In addition to knowing the average, you must know how the data values are dispered. The measures that determine the spread of the data values are called measures of variation. These measures include the range, variance, and standard deviation. The range is the difference between the largest and smallest values of a data distribution. A large bakery regularly orders cartons of maine blueberries. The average weight of the cartons is supposed to be 22 ounces. Random samples of cartons from two suppliers are weighted. The weights in ounces of the cartons were: 27: compute the range of carton weights from each supplier:
