Method of Least Squares

STAT 20: Introduction to Probability and Statistics

Concept Questions

Concept Activity - Linear Models Review

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Which of the following tasks are regression tasks?

• A. Amazon sets a price for its books which is dependent on the books’ weight and whether the books are hardback or paperback.

• B. A Waymo engineer is working on a model to determine whether a self-driving car is seeing a real car or a reflection of a car.

• C. The Weather Channel predicts tomorrow’s temperature based on historical data, tomorrow’s expected weather conditions and yesterday’s temperature.

• D. The UCB Admissions office has to predict whether a student will accept its admission offer or not based on the student’s high school and her intended major.

01:00

Concept Question 3

• Here is a function f.

f <- function(x, y) {
  y*(x + 3) 
}

What will the following line of code return?

f(3,5)

This question reminds students that if function arguments are unnamed, they are assumed to have been input in the order they were originally specified as in the function definition. x will be assigned 3, and y will be assigned 5, so the correct answer is 30.

Break

05:00

PS: Method of Least Squares

40:00