Question

13. Emily wants to survey bus riders at her university to determine if they are satisfied with the current routes offered.  There are 14 different bus routes at her school.  She randomly picks 4 of these bus routes and for one day she surveys all students on each of these 4 routes.  What kind of study design is this?

	a.	Observational Study: Stratified Sample
	b.	Experimental Study: Case-Control Design
	c.	Observational Study: Cluster Sample
	d.	Experimental Study: Matched Pairs Design
	e.	Experimental Study: Block Design

Answer 1

Answer- C Observational study :cluster sampling

Cluster sampling- The Smallest unit in which the population can be divided is called an element of the population is called an element of the population. A group of such elemnt is called cluster sampling.

Clusters are genrally made up of neighbouring elements and therefore the element within the cluster tend to have similar charateristics as a simple rule number of elements in a cluster should be large.

Here route are clusters in cluster sampling we randomly select clusters and we are randomly select 4 routes according to question out of 14 diffrent routes.

And testing satisfied with the current routes offered in randomly selected 4 routes and  surveys all students on each of these 4 routes