ECON 2113 Chapter Notes -Cumulative Frequency Analysis, Standard Deviation, Frequency Distribution
Document Summary
This document content statistics questions and their model answers: group internet use data into group frequency table: Step 1: find range = largest observation smallest observation. Step 2: find class width by dividing the range by the number of classes: class width = A rule of thumb for the number of classes is n e. g number of classes = 50 = 7. 071068. Thus the class width = range /number of classes =( 88 7)/7 = 81/7= 11. 57. Rounding up gives a class width of 12. Step 3: find class boundaries starting from lowest observation and adding class width to find upper limit. This gives boundaries of 7, 19, 31, 43, 55, 67, 79, and 91. Note: we will have the classes running from 7 to 19, etc where the upper bound is exclusive, i. e it does not include 19. Step 3: for each class, count the number of observations that fall in that class.
