1038 Beer and blood alcohol How well does the number of beer

10.38 Beer and blood alcohol. How well does the number of beers a student drinks predict his or her blood alcohol content (BAC)? Sixteen student volunteers at Ohio State University drank a randomly assigned number of 12-ounce cans of beer. Thirty minutes later, a police officer measured their BAC.^16 The students were equally divided between men and women and differed in weight and usual drinking habits. Because of this variation, many students don\'t believe that number of drinks predicts BAC well.| (a) Make a scatterplot of the data. Find the equation of the least-squares regression line for predicting BAC from number of beers and add this line to your plot. What is r^2 for these data? Briefly summarize what your data analysis shows. (b) Is there significant evidence that drinking more beers increases BAC on the average in the population of all students? State hypotheses, give a test statistic and P-value, and state your conclusion.

Solution

First enter all of your data into your graphing calculator. Click on \"STAT\", then \"EDIT\", enter all of your data. After all of your data is entered, click on \"STAT\" once again, and scroll over to \"CALC\". You will then see on line 4 \"LinReg(ax+b), click on that and hit \"ENTER\" and then \"ENTER\" again. You will see values that the calculator calculated for you such as your linear regression line, your r value and r-squared value