Epidemiology for Public Health Practice 5th Edition by Robert Friis,Thomas Sellers

تمرين 6

You are conducting a study of insulin resistance and its relationship to body weight. Using a weight scale as your instrument to measure body weight, you find the scale always reads 30 kg regardless of who is standing on it. Discuss the validity and reliability of the scale. Questions 7 through 10 are multiple choice items. Select the correct answer from the options that follow each question.