STT 212 Chapter Notes - Chapter 3: Pie Chart, Categorical Variable, Interquartile Range
4 Feb 2017
School
Department
Course
Professor
Document Summary
Observation each number or letter in the table. Takes numerical values for which arithmetic operations make sense. Discrete variables variables that must be expressed as whole numbers: one that has gaps between possible values. Continuous variable variables that can be expressed with decimals: there are no gaps between possible values (can find a value between any two numbers, categorical. A variable which places an individual into one of several groups or categories. Categorical variables can be distinguished by numbers. Distribution of a variable/ frequency: the values the variable can take on, how often it takes on those values. Frequency tables: we are interested in determining the most frequently and infrequently distribution, to do this, you collect all the categories and determine how many is in each. You then divide the number by the total to find the relative frequency. How to enter data: store the data by using the c function (example is storing under the name bodypart, frequency table.
