70-208: Regression. Lecture 1: Introduction to Regression Analysis. Spring 2014. John Gasper. Welcome. What is Regression? Why should we care? What can we do with it? How much do sales increase with every advertisement placed? How do wages of employees depend on education?
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70-208: Regression
Lecture 1: Introduction to Regression Analysis
Spring 2014
John Gasper
Teaching staff:
Data: what is it?
(different class)
?
{
boxplot
{
histogram
Center: Median?
Inter quartile range?
Center: Mean?
Center: Mean?
What is the Normal distribution?
Normal, or Gaussian, distributions are going to be very important for us.
Different μ
Different σ
Normality
If data track the diagonal line,
you can safely assume it’s a
Normal distribution.
What is a z-score?