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 fewer days per month than people who are day laborers?

DO NOT ASSUME THE POPULATION STANDARD DEVIATIONS OF THE TWO SAMPLES ARE EQUAL

Group 1: Work in Office

Sample mean = 15.5

Sample standard deviation = 5

Sample size = 16

Group 2: Day Laborers

Sample mean = 18.2

Sample standard deviation = 7

Sample size = 14