Lesson 1380 of 1524
Linear Regression and Correlation
The variable x is the independent variable ; y is the dependent variable .
Practice this chapterThe variable x is the independent variable ; y is the dependent variable . The rate for services is $32 per hour plus a $31.50 one-time charge.
Linear regression for two variables is based on a linear equation with one independent variable. Typically, you choose a value to substitute for the independent variable and then solve for the dependent variable
variable x — the independent variable ; y is the dependent variable. rate for services — $32 per hour plus a $31.50 one-time charge. coefficient of correlation — a measure developed by Karl Pearson during the early 1900s that gives the strength of association between the independent variable and the dependent variable; r = n ∑ x y - [ ∑…. outlier — an observation that does not fit the rest of the data.
Be able to use the 95 Percent Critical Values table for r with df = n - 2 = 11 - 2 = 9.
Worked example
What does “variable x” mean in Linear Regression and Correlation?
- 1Use the wording this chapter gives for variable x.
- 2The book says: the independent variable ; y is the dependent variable.
- 3Do not use the meaning of rate for services. That term means $32 per hour plus a $31.50 one-time charge.
Result: the independent variable ; y is the dependent variable
Why. That is the meaning this chapter gives for variable x.
Do not swap variable x and rate for services. variable x means the independent variable ; y is the dependent variable. rate for services means $32 per hour plus a $31.50 one-time charge.
Practice margin
This chapter
A fresh set from this chapter only. Choose 10 or 20. Multiple choice and fill-in, with no repeat inside the set.