Statistics · Chapter 8 of 10

Regression & correlation

0 curated · 37 from open sources

Before you startAI-drafted · not yet reviewed by an editor

In regression, the explanatory variable $x$ is used to predict the response variable $y$ . The regression line is $\overset{y}{^} = a + b x$ , where $b = r \frac{s _{y}}{s _{x}}$ and $a = \overset{y}{ˉ} - b \overset{x}{ˉ}$ . The correlation coefficient $r$ measures the strength and direction of a linear relationship between $- 1$ and $1$ .

All Easy Medium Deep

From open sources

Showing everything, including problems with no answer to check, a missing figure, or a near-copy elsewhere. Show only complete problems

#	Title	Difficulty
128366	Scatter Plots, Correlation, and Regression Lines · Example 1	Easy
128369	Scatter Plots, Correlation, and Regression Lines · Example 4	Easy
128370	Scatter Plots, Correlation, and Regression Lines · Example 5	Easy
128371	Scatter Plots, Correlation, and Regression Lines · Example 6	Easy
128372	Scatter Plots, Correlation, and Regression Lines · Example 7	Easy
128373	Scatter Plots, Correlation, and Regression Lines · Example 8	Easy
130048	Linear Equations · Example 1	Easy
130050	Linear Equations · Example 2	Easy
130094	Prediction · Example 1	Easy
130119	Outliers · Example 2	Easy
130827	Predicting with a Regression Equation · Example 2	Easy
131918	Linear Equations · Try It 3	Easy
131925	The Regression Equation · Try It 1	Easy
131929	Testing the Significance of the Correlation Coefficient (Optional) · Try It 1	Easy
131930	Testing the Significance of the Correlation Coefficient (Optional) · Try It 2	Easy
131955	Outliers · Example 2	Easy
130826	Predicting with a Regression Equation · Example 1	Easy
131931	Prediction (Optional) · Try It 1	Easy
128367	Scatter Plots, Correlation, and Regression Lines · Example 2	Easy
128368	Scatter Plots, Correlation, and Regression Lines · Example 3	Easy
130047	Linear Equations · Try It 1	Easy
130049	Linear Equations · Try It 2	Easy
130051	Linear Equations · Try It 3	Easy
130069	Scatter Plots · Try It 1	Easy
130075	The Regression Equation · Try It 1	Easy
130087	Testing the Significance of the Correlation Coefficient · Try It 1	Easy
130088	Testing the Significance of the Correlation Coefficient · Try It 2	Easy
130089	Testing the Significance of the Correlation Coefficient · Try It 3	Easy
130090	Testing the Significance of the Correlation Coefficient · Try It 4	Easy
130095	Prediction · Try It 1	Easy
130118	Outliers · Example 1	Easy
130120	Outliers · Try It 1	Easy
130121	Outliers · Example 3	Easy
130122	Outliers · Try It 2	Easy
131954	Outliers · Example 1	Easy
131956	Outliers · Example 3	Easy
131957	Outliers · Try It 2	Easy