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# Correlations, Correlation Coefficient, and Random Variables

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1. Describe the correlation in this graph (see graph in attachment)

2. Which of these is true for the correlation coefficient?
- its range is [-1 1]
- we use r to represent it
- we use r^2 to represent it
- both 1 and 2
- both 1 and 3

3. Indicate whether the random variable x is discrete or continuous after each statement
a) discrete or continuous: x is the exact volume of milk in each gallon container in a dairy
b) discrete or continuous: x is the number of cars driving on a major highway
c) discrete or continuous: x is the number of defective motherboards in a computer factory

Please see the attached file for full problem description.

https://brainmass.com/statistics/correlation/correlations-correlation-coefficient-and-random-variables-134897