Question

A candidate for mayor of Dallas wants to know what proportion of city residents support his candidacy. His staff calls 1,000 people chosen at random from the city telephone directory and 850 of them respond. What are the population and the sample in this example

Answer 1

Using sampling concepts, it is found that:

• The population is all the people in the telephone directory for the city of Dallas.

• The sample is the 1000 people chosen.

Example of sampling:

Suppose I want to estimate the proportion of New York state residents who are Buffalo Bills fans. So i ask, lets say, 1000 randomly selected New York state residents whether they are Buffalo Bills fans, and expand this to the entire population of New York State residents.

In this case for the example:  

• The sample is 1000 residents, that is, the people selected.

• The population is all New York State Residents, that is, the group to which these people selected belong.

In this problem, 1000 people are chosen at random from all the people in the telephone directory for the city of Dallas, hence:

• The population is all the people in the telephone directory for the city of Dallas.

• The sample is the 1000 people chosen.

You can learn more about sampling at https://brainly.com/question/21896824