Question

Next 3 questions are based on this scenario: A hypothetical Poll interviewed 1012 randomly selected U.S. adults aged 18 and older. Based on this poll, it was learned that 61% of those interviewed believed in global warming. The other 39% thought that global warming would never happen.

Question:

What is the population?

Select one:

a. The 39% who thought global warming would never happen

b. The 1012 randomly selected U.S. adults

c. All U.S. adults

d. The 61% who said they believe in global warming

What is the sample?

Select one:

a. The 61% who said they believe in global warming

b. The 39% who thought global warming would never happen

c. The 1012 randomly selected U.S. adults

d. All U.S. adults

What is the statistic in this study?

Select one:

a. The proportion of U.S. adults who believe in global warming

b. The proportion of the 1012 randomly selected U.S. adults who believe in global warming

Answer 1

Solution:

We are given that:A hypothetical Poll interviewed 1012 randomly selected U.S. adults aged 18 and older. Based on this poll, it was learned that 61% of those interviewed believed in global warming. The other 39% thought that global warming would never happen.

Part 1) What is the population?
A population is the all units belongs certain kind of variable.

Here we are selecting a sample of people from the U.S. adults aged 18 and older.

Thus the population is All U.S. Adults.

Thus option c. All U.S. adults is correct.

Part 2) What is the sample?

Sample is subpart or subset of population.

Here we have randomly selected 1012 U.S. adults for sample.

Thus correct option is:

c. The 1012 randomly selected U.S. adults

Part 3) What is the statistic in this study?

Statistic is characteristics which represent the sample like sample mean, sample proportion etc.

Thus correct option is:

b. The proportion of the 1012 randomly selected U.S. adults who believe in global warming.