Chapter 2: Frequency Tables PDF

Chapter 2 Dr. Tharu Spelman College Contents Introduction.................

Chapter 2 Dr. Tharu Spelman College Contents Introduction................................................. 1 Frequency Table.............................................. 1 Relative frequency............................................. 2 Histogram.................................................. 2 Ogive curve................................................. 3 Bar Graph.................................................. 4 Circle graph (Pie graph).......................................... 5 Stem and Leaf plot............................................. 6 Introduction A frequency table is simply a two-column table which outlines the various possible outcomes and the associated frequencies observed in a sample. Example: Frequency Table for Qualitative Data. The following are responses from 20 students with respect to their favorite color Frequency Table "purple" "red" "blue" "red" "green" "blue" "purple" "blue" "green" "green" "yellow" "purple" "red" "yellow" "green" "orange" "yellow" "blue" "green" "green" color blue green orange purple red yellow 4 6 1 3 3 3 Listed data – Data such that each observation is written out in a list, no tabulation or grouping of information. Grouped data – Data such that the range of the data is divided into equal intervals – Data grouped into the various classes or class intervals – These class intervals are intervals on the real number line in which each data point can be uniquely placed. Example: Numerical variable - Construct a frequency table for the listed data: 2, 2, 6, 3, 5, 4, 4, 7, 5, 2, 7, 4, 5, 3, 2, 2, 5, 7, 2, 4 1 data