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Previous research states, no evidence currently exists supporting or refuting the use of electric fans during heat waves in terms of mortality and illness. Counterintuitively,

Previous research states, "no evidence currently exists supporting or refuting the use of electric fans during heat waves" in terms of mortality and illness. Counterintuitively, Public Health guidelines suggest not using fans during hot weather, with some research reporting the potential of fans accelerating body heating.

You decide to research further this seemingly contradictory guidance, hypothesizing that the true population average core body temperature amidst higher ambient temperature and humidity levels while using an electric fan is different than 112.1 degrees Fahrenheit (F) and you set the level of significance at 2.5% for your formal hypothesis test. You randomly sample 31 participants based on your research funding and for 45 minutes, the study participants sit in a chamber maintained at a temperature of 108F (i.e., 42 degrees Celsius) and a relative humidity of 70%. After the first 45 minute warming period, for each participant you place a personal sized electric fan 3 feet away with its airflow directed at a given participant's chest area, and the participants relax in this position for the next 45 minutes. At the end of this 45 minute fan period, you record the core body temperature of all participants. The following table comprises the data you collect.

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