As part of the dietary-instruction program, ten 25-34-year-old males adopted the vegetarian diet for 1 month. While on diet, average daily intake of linoleic acid was 13 g with standard deviation = 4 g. If average daily intake among 25-34-year-old males in general population is 15 g, then, using the significance level of .05, test hypothesis that intake of linoleic acid in this group is lower than that of general population. Also, calculate p-value for hypothesis test.