Concept explainers
To find: The survey of two students at random from each class.
Answer to Problem 3LC
The sampling method is stratified.
Explanation of Solution
Given information:
The given are two students at random from each class.
Calculation:
Consider the expression
The survey is done in two students at random in each class, so use the definition of
Stratified Sampling method: In this method, population is divided into the number of groups, and then random samples are taken from each groups and survey.
To determine the sampling method on survey of two students at random in each class, use the definition of stratified sampling method.
Here the population is divided into the number of classes. And survey two students at random in each class
Therefore the sampling method is stratified.
Chapter 12 Solutions
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