An Advocacy Group Is Interested in Determining If Gender (1

Multiple Choice

An advocacy group is interested in determining if gender (1 = Female, 2 = Male) affects executive level salaries.They take a random sample of executives in three different industries: (1 = Consumer Goods, 2 = Financial, 3 = Health Care) .Salary data are collected.Which of the following statements is TRUE?
I.This is an experimental study.
II.This is an observational study.
III.This is a randomized block design.
GLOBAL : Please check spacing

A) I only
B) II only
C) III only
D) Both I and III
E) Both II and III