Use the mouse to put points in the blue area. After each point, the correlation coefficient and the regression equation will be calculated. To remove points, select the Erase point option, then click on the point you want removed. Clear plot will remove all the points; Residuals will pop up a scatter plot of X versus the residuals, as well as a histogram of the residuals. To add random points to the plot, press Random points, after changing the number and correlation for the new points if you wish.
Software/Applets used on this page
An applet from CUWUSTAT (regretfully, their web site appears to no longer be available).
The constant value in an expression, for example in 3x the coefficient of x is 3.
The degree of relationship between two random variables, in the range -1 to 1.
A statement that two mathematical expressions are equal.
A statistical diagram for continuous data similar to a bar chart but where the area of each bar is proportional to the frequency.
To mark a point on a graph accurately by using its coordinates.
A statistical model, whereby the expected value of a variable y is expressed in terms of known values of x.
A scatter plot or scatter graph or scatter diagram displays as a collection of points, each having the value of one variable determining the position on the horizontal axis and the value of the other variable determining the position on the vertical axis.
This question appears in the following syllabi:
|AQA A-Level (UK - Pre-2017)||S1||Correlation and Regression||Correlation||-|
|AQA AS Maths 2017||Statistics||Data Presentation and Interpretation||Correlation||-|
|AQA AS/A2 Maths 2017||Statistics||Data Presentation and Interpretation||Correlation||-|
|CCEA A-Level (NI)||S2||Correlation and Regression||Correlation||-|
|Edexcel A-Level (UK - Pre-2017)||S1||Correlation and Regression||Correlation||-|
|Edexcel AS Maths 2017||Statistics||Correlating Bivariate Data||Correlation||-|
|Edexcel AS/A2 Maths 2017||Statistics||Correlating Bivariate Data||Correlation||-|
|I.B. Higher Level||7||Correlation and Regression||Correlation||-|
|I.B. (MSSL)||6||Correlation and Regression||Correlation||-|
|OCR A-Level (UK - Pre-2017)||S1||Correlation and Regression||Correlation||-|
|OCR AS Maths 2017||Statistics||Scatter Diagrams and Correlation||Correlation||-|
|OCR MEI AS Maths 2017||Statistics||Scatter Diagrams and Correlation||Correlation||-|
|OCR-MEI A-Level (UK - Pre-2017)||S2||Correlation and Regression||Correlation||-|
|Pre-U A-Level (UK)||Prob||Correlation and Regression||Correlation||-|
|Scottish (Highers + Advanced)||HS||Correlation and Regression||Correlation||-|
|Scottish Highers||S||Correlation and Regression||Correlation||-|
|Universal (all site questions)||C||Correlation and Regression||Correlation||-|
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2 Calculate Sxx, Syy and Sxy 1
3 Two dice
4 Calculate the PMCC
5 O-test 1
6 Calculate Sxx, Syy and Sxy 2
7 The PMCC
9 Calculate the PMCC 2
11 Plotting points
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13 Calculate sx, sy & sxy 1
14 Calculate sx, sy & sxy 2
15 Timed O-test
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23 Exam O-test 1
24 Exam O-test 2
25 Exam timed O-test
26 Exam Question 2001
27 Exam Question 2001
28 Exam Question 2001
29 Exam Question 2001
30 Exam Question 2003
31 Exam Question 2003
32 Exam Question 2007
33 Exam Question 2007
34 Exam Question 2007
35 Exam Question 2007
36 Exam Question 2008
37 Exam Question 2008
38 Exam Question 2008
39 Exam Question 2008
40 Exam Question 2008
41 Exam Question 2008
42 Exam Question 2008
43 Exam Question 2009
44 Exam Question 2010
45 Exam Question 2011