An administrator wants to estimate the average amount of tim

An administrator wants to estimate the average amount of time high school students spend traveling to school. The plan is to stratify the students according to grade level and then take a simple random sample from each grade. What is potentially good and what is potentially bad about this plan

Solution

THE AIM IS TO FIND THE AVERAGE TIME TAKEN TO COME TO SCHOOL

POTENTIALLY BAD

DIVIDING THE STUDENT ACCORDING THE GRADE WILL NOT GIVE A PROPER DISTUINGUISH BETWEEN THE TIME, BETTER WOULD BE IF WE CAN DIVIDE ACCORDING TO THE DISTANCE FROM SCHOOL TO THEIR HOME

POTENTIALLY GOOD

DIVIND THE STUDENTS ACCORDING TO GRADE WILL LET US KNOW IF TRAVELLING TIME HAS ANY MAZOR INFLUENCE IN GRADE, AND CAN SHORT TRAVELLING TIME GIVE EDGE TO SCORE MORE BETTER GRADES .