Question

Question 1. Which of the following could most be considered an ordinal variable? A) Height in feet B) Body Mass Index (BMI) C) Education level D) Annual income Question 2. Often, we cannot determine the accuracy of a measurement when the true value of a variable in a population is unknown. Instead, many researchers tend to value the precision of an estimate in their research. Which of the following results is the most precise about their estimate? A) Out of 30 observations, 17 are 32 cm, 12 are 29 cm, and 1 is 12 cm B) Out of 30 observations, 20 are 31 cm, 5 are 21 cm, 3 are 34 cm, and 2 are 35 cm C) Out of 30 observations, 10 are 32 cm, 10 are 31.5 cm, and 10 are 32.5 cm D) Out of 30 observations, 10 are 31 cm, 10 are 21 cm, and 10 are 41 cm Question 3. Which of the following is least likely to be considered an ordinal variable during analysis? A) Education level (Primary school, High school, Bachelor's, Master's, PhD/MD/JD) B) BMI category (Underweight, Normal, Overweight, Obese) C) BMI (kg/m2) D) Age divided into quartiles (<25h percentile, 25-50th percentile, 50-75th percentile >75th percentile) Question 4. Which of the following is not a main goal of biostatistics in research practice? A) Improve the intellectual content of data reported from a trial/study. B) Rely on statistical tests to assess the validity of a study. C) Report only those results which indicate influential observations. D) Organize data into understandable forms.

Answer 1