A researcher researches the impact of wearing a hat or not wearing a hat on core body temperature. Half of the participants are made to wear a wool hat while walking outside for 30 min. on a cold, winter day and the other half of the participants are not allowed to wear a hat on their 30 min. walk on that same cold, winter day. The researchers measure each person's core temperature as soon as the walk is done (higher temps mean warmer body). Other than hats or no hats, the groups are wearing the exact same clothes during their walk. Does wearing a hat make people's core body temperature warmer than not wearing a hat? Test at = .05. No HatHat 100105 95100 99104 96101 t=-2.97, SD=2.38, SE=1.19 e. Calculate and interpret Cohen's d for the effect hat wearing has on core body temperature. f. Is a test for homogeneity of variance needed