Statistical Sciences 2035 Lecture Notes - Lecture 2: Random Variable, Frequency Distribution, Long Tail
19 Oct 2015
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Document Summary
In this chapter we will learn about several techniques for summarizing and depicting data. Frequency distributions/graphical displays for quantitative data (section 2. 1/2. 2) A fast food restaurant has a drive-through lane. #1) is interested in how many cars go through the drive-through lane during the lunch hour (11:45 to 1:15 pm). The fast food chain gathers the following data on the number of cars passing through the drive-through lane during the lunch hour over the past 39 days: We see in example 2. 1 that things start with a question: What type of data you have will determine how you organize and summarize your data. However, one of the goals is to determine the distribution of the variable you are interested in (you want the distribution of the data) In example 2. 1, the numbers vary this is called variation the pattern of variation of a variable is called its distribution. The distribution of a variable is best displayed graphically.
