Question

1. Please define population and sample in your own word.

2. Please indicate the population and sample of each of the scenarios below.

Scenario 1: A college wants to determine if students prefer face-to-face or online classes. 100 students are selected at random and given a survey.

Scenario 2: A restaurant wants to determine customer satisfaction. They place cards on the tables and 55 surveys are returned.

Scenario 3: CNN wants to predict the outcome of an election. They poll 250 voters as they are leaving the polling place.

Answer 1

Solution: 1. Population: Population is a group of items, units or subjects which is under reference of study. Population may consist of finite or infinite number of units.

Sample: Sample is a part or fraction of a population selected on some basis. Sample consists of a few items of a populationn.

Scenario 1: A college wants to determine if students prefer face-to-face or online classes. 100 students are selected at random and given a survey.

Answer: Population: Entire College students

Sample: 100 college students

Scenario 2: A restaurant wants to determine customer satisfaction. They place cards on the tables and 55 surveys are returned.

Answer:

Population: All the customers who visited the restaurant

Sample: 55 customers who responded to survey

Scenario 3: CNN wants to predict the outcome of an election. They poll 250 voters as they are leaving the polling place.

Answer:

Population: All voters

Sample: 250 voters