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Lecture Comments (2)

1 answer

Last reply by: Sandahl Nelson
Mon Apr 4, 2016 3:11 PM

Post by Liuzixuan Hu on March 29, 2016

Hello, Mrs.Nelson!

I am wondering, on the AP Exam, if I am using the calculator to do all those LinRegTTest work, do I still need to list all the formulas on the test? And for the P-value you calculated on the Example: Hypothesis Testing, you didn't show the work, would that be okay on the tests?

I just really do not know when I can just write down the results and when I have to list all the formulas and works on the FRQ..

Thank you so much!


Hypothesis Testing of 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
  • Lesson Overview 0:10
  • Review of Least-squares Regression and Interpretation 0:29
    • Correlation Coefficient ( r )
    • Equation of the Least-squares Regression Line
  • Example 2:45
    • Part A: Least-squares Regression Line
    • Part B: Slope of the Least-squares Regression Line
  • Test for the Regression Line 7:50
    • Is There a Correlation?
    • Is the y-intercept = 0?
  • Conditions for Hypothesis Testing 10:49
    • Linearity
    • Constant Variability
    • Normality
    • Independence
  • Hypothesis Testing 16:10
    • Standard Deviation of the Residuals
    • Standard Error of Slope
    • Test Statistic
    • Confidence Interval
  • Example: Hypothesis Testing 20:45
    • Part A: Test the Hypothesis
    • Part B: 95% Confidence Interval of the Slope
  • Interpreting Computer Output 35:40
    • Interpreting Computer Output
  • Example I: Interpreting Computer Output 38:46
    • Part A: Least-squares Regression Equation
    • Part B: Standard Error
    • Part C: Slope of the Least-squares Regression Line
    • Part D: Null and Alternative Hypotheses
    • Part E: Value of Test Statistic
    • Part G: P-Value
    • Part H: Is Income Useful for Predicting the Cost of a Person’s Car?
    • Part I: Estimated Cost
  • Example II: Interpreting Computer Output 47:48