Obesity: the national center for health statistics conducted the national health interview survey (nhis) for 27,787 u. s. civilian noninstitutionalized adults in january – september 2014. according to an early release report, an estimated 29.9% of u. s. adults aged 20 and over were obese. obesity is defined as a body mass index (bmi) of 30 kg/m 2 or more. true or false? the 29.9% is a parameter representing a population of 27,787 adults.