20. A beer pub wanted to test the difference in drinking habits between a younger group of customers aged under 30 years old (n=8) and an older group, age 50 or older (n=10). The pub collected data on the number of beers consumed from November through March by each person. Please use a t-test to see if beer consumption differed significantly between the two age groups. Under 30 Over 50 41 35 13 64 25 39 73 75 53 61 50 89 36 45 29 55 49 78 a. State the hypotheses of the study. b. Find the critical t value for this study at an alpha level at a=.05. c. Compute the independent t test by hand (use a calculator with stat mode - find one!). d. If significant, perform a percentage of variance effect size test (r2). e. State the results in APA format (numbers and words) and don't forget to include all parts in the sentence and the direction of the results