Chapter5b.Rmd

# Ch. 5 Joint Probability {-}

Sections covered: 5.1, 5.2

## 5.1 Jointly Distributed Random Variables {-}

Skip *everything but* "Two Discrete Random Variables" pp. 199-200

and "Independent Random Variables" pp. 204-205 (discrete case only)

<script src="https://d3js.org/d3.v4.min.js"></script>

<div id="corr" style="width: 600px">
	
### *Interactive* {-}
	  
**Click anywhere on the graph to add points. The correlation coefficient will be calculated.**	  
	  
<p>The correlation coefficient (r) is a measure of the linear relationship
	  between two variables x and y. To get a sense of the connection between the
	  appearance of points -- (x,y) pairs --  in a scatterplot and the value of r,
	  click anywhere on the graph to add points. To remove points, click the Remove 
	  points button and then mouseover points.</p>

<table>	
<td>
<p>
<input type="radio" name="typeofaction" value="add" checked="true">&nbsp;Add points
<input type="radio" name="typeofaction" value="remove">&nbsp;Remove points
</p>
</td><td>
		
<p id="r">Two points are needed to calculate r.</p>
</td></table>
</div>

<script src="scripts/corrcoef.js"></script>

## Resources {-}

Correlation and Covariance Visualization

https://shiny.rit.albany.edu/stat/rectangles/