In a study on caffeine and stress, college students indicated how many cups of coffee they drink per day and their current stress level on a scale of 1 to 10. The table shows the survey results. Using a web-calculator, obtain the appropriate correlation coefficients.
Number of cups Stress level
Total Numbers: 8
Did I answer this correctly?
Statistics - Damon, Saturday, February 5, 2011 at 5:01pm
Yes, using http://easycalculation.com/statistics/correlation.php
I get .8519
Statistics - SHelia, Saturday, February 5, 2011 at 5:11pm
Thank you for your help. I used that same webpage for help but I still wasn't sure that I was doing it correctly. Thanks for double checking.
Statistics - sharon, Tuesday, March 27, 2012 at 12:48am
Please note that stress variable can assume only two values high or low. Is it not nominal ? (You are told that this study was looking at the effects of stress (low or high) on consumption of caffeine).