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STA220H5 (15)
Lecture 2

STA220 - LECTURE 2 NOTES.docx

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Department
Statistics
Course
STA220H5
Professor
Olga Fraser
Semester
Fall

Description
LECTURE 2 NOTES Qualitative variables: graphs - pie charts, bar charts Quantitative variables: graphs - dotplots, frequency tables, stem and leaf plots, histograms STEM AND LEAF Plots 1. Find the largest and smallest number. 2. Split all numbers into two parts: the stem and the leaf. The stem is the left part of the number and the leaf is the right part. 3. The stem consists of a column of numbers in sequence starting with the smallest. There should be 5 to 20 stems. The number of stems depends on the size of the data set. Small data sets should have few stems. 4. Write the leaf part for every number on the same line as its stem. SUGGESTIONS FOR THE LEAF: Use only 1 digit and drop the rest of the number. Do not
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