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Practice Questions
Outliers Practice Questions
Use the dataset above to answer the following questions.
1. Suppose the following points were in the above data set. Which of them would best be considered an outlier?
*
a. 1.7, 9.3
b. 4.3, 8
c. 8.2, 9
d. 3, 7.1
2. Deleting which of the following points weakens the correlation between beauty and evaluation scores?
*
a. 6.5, 7.075
b. 3.333, 9.1
c. 3, 6.85
d. 3, 8.425
3. Adding which of the following points strengthens the correlation between beauty and evaluation scores?
*
a. 7.2, 6.8
b. 3.7, 9.5
c. 5.5, 6
d. 2.1, 6.1
4. Which of the following statements is true?
*
a. Adding a point near the regression line always strengthens the correlation between beauty and evaluation scores.
b. Removing a point near the regression line always weakens the correlation between beauty and evaluation scores.
c. Adding a point near the top-left corner of the graph weakens the correlation between beauty and evaluation scores.
d. Removing a point near the top-right corner of the graph strengthens the correlation between beauty and evaluation scores.
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Understanding Data
Course
(9 videos)
Introduction
Introduction to Understanding Data
Linear Regression
Intro to Linear Regression
Practice Questions
Interpreting the Regression Line
Practice Questions
Outliers
Practice Questions
(Coming Soon) Standard Error, T-statistic, Statistical Significance
(Coming Soon) P-Value
(Coming Soon) R Squared
(Coming Soon) Improving Your Regression Model
(Coming Soon) Linear Regression: Common Pitfalls