Calculate the appropriate test statistic based on the information provided (round your answer to 4 decimal places): Research Question: Do people who work in offices exercise a different number of days per month than people who are day laborers? ASSUME THE POPULATION STANDARD DEVIATIONS OF THE TWO SAMPLES ARE EQUAL Group 1: Work in Office Sample mean = 16.5 Sample standard deviation = 5 Sample size = 13 Group 2: Day Laborer Sample mean = 18.2 Sample standard deviation = 6.5 Sample size = 14