Research examining the effects of sun exposure has found that 15 min. of direct sun exposure often leads to greater feelings of energy compared to less than 15 min. of direct sun exposure. In a typical study into this phenomenon, a researcher obtains a sample of adults who spent at least 15 min. outside on a full sun day (no clouds) in the direct sunlight. The group is given a standardized energy test for which the general population of adults is 35.25 (higher scores indicate greater energy). The scores for the sample are as follows: 38, 36, 36, 34, 37, 40, 33, 36, 37, 38 Is this group of adults feeling more energy because of their sun exposure? Test at = .05. M=36.50, SD=2.01, SE=.64, t=1.96, df=9, Calculate percentage of variance accounted for and describe the result in terms of the specific IV and DV