Use the following information for questions:
A student doing an internship at a large research firm collected the following data, representing all of the studies the firm had conducted over the past 3 years.
-What is the probability that the study used randomization, if we already know that the study was a retrospective observational study?
A) 0.1167
B) 0.2333
C) 0.26
D) 0.3111

Question

Use the following information for questions:
 A student doing an internship at a large research firm collected the following data, representing all of the studies the firm had conducted over the past 3 years. 
-What is the probability that the study used randomization, if we already know that the study was a retrospective observational study?
A) 0.1167 
B) 0.2333 
C) 0.26 
D) 0.3111

Quizplus · Accepted Answer

Retrospective observational studies typically do not use randomization, as they analyze existing data collected for other purposes. Therefore, the probability is very low, closest to 0.1167.

Use the Following Information for Questions