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 a. What is most appropriate test statistic to use with this data? Explain/support your answer. b. Operationally define the IV for this study. c. Operationally define the DV for this study