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For more information, please see full course syllabus of Statistics
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Lecture Comments (2)

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Post by Alex Moon on March 19, 2013

By the way, is this the same professor Yates that is the author of Practice of Statistics?

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Post by Alex Moon on March 19, 2013

How do I use my Ti-84 to calculate the summation of lits x and y?
I know how to use 1-Var stats, which does summation of lists and summations of squares of lists.

I need to find how to do sigma(xy).

Any help?

Confidence Intervals for the Slope of a Least Squares Regression Line

  • If the random errors of the simple linear regression are normally distributed, then the sampling distribution of b is normal.

  • To calculate the estimator of the standard deviation of b, sb , the quantities of Sxx, Sxy , and Syy will be needed.

  • To estimate the slope of the regression line β, use the t-distribution with ν = n − 2 degrees of freedom.

Confidence Intervals for the Slope of a Least Squares Regression Line

Lecture Slides are screen-captured images of important points in the lecture. Students can download and print out these lecture slide images to do practice problems as well as take notes while watching the lecture.

  • Intro 0:00
  • Sampling Distribution of b 0:08
  • Calculating the Estimator of Standard Deviation of b 1:03
  • Confidence Interval for Beta 1:31
  • Example 1: Age and Price 2:24
  • Example 2: Weld Diameter 6:41
  • Extra Example 1
  • Extra Example 2