Lecture02 - STAT 350: LECTURE 2 TOPICS 1.2: Visual Display...

Info iconThis preview shows pages 1–7. Sign up to view the full content.

View Full Document Right Arrow Icon
STAT 350: LECTURE 2
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
TOPICS 1.2: Visual Display for Univariate Data Histograms 1.3: Describing Distributions Density Functions
Background image of page 2
HISTOGRAM Ratings of a book from 30 readers
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
DESCRIPTIVE STATISTICS: GRAPHICAL Graphical display: informative and clear Numerical measures: Provides a quantitative measure Example: Mean, Median center of the data Standard deviation -- spread of the data
Background image of page 4
HISTOGRAMS FOR DISCRETE DATA Construction: Count the occurrence of each value of the variable Plot the counts (frequency) on the vertical axis Can display as frequencies (counts) or relative frequencies (percents)
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
ISTOGRAM FOR CONTINUOUS DATA Construction: Subdivide the x-axis into a number of class intervals Equal class width or unequal class width Plot the relative frequency for each class Height = relative frequency of the class / class width Q: How to find the relative frequency of a class? The class size influences how the histogram looks
Background image of page 6
Image of page 7
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 02/06/2012 for the course STAT 350 taught by Professor Staff during the Spring '08 term at Purdue University-West Lafayette.

Page1 / 29

Lecture02 - STAT 350: LECTURE 2 TOPICS 1.2: Visual Display...

This preview shows document pages 1 - 7. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online