Question

Exhibit 1-2
In a sample of 3,200 registered voters, 1,440, or 45%, approve of the way the President is doing his job.

Refer to Exhibit 1-2. A political pollster states, "Forty five percent of all voters approve of the President." This statement is an example of

		a sample
		descriptive statistics
		statistical inference
		a population

Answer 1

The correct option is statistical inference.

Statistical inference is the process through which inferences about a population are made based on a certain statistics calculated from sample of data drawn from population.

It means drawing conclusion based on data.

In this case “45% of all voters approve of the President” this statement is the characteristics of a population, derived from the analysis of a sample drawn from it.

Here 45% approval is the descriptive statistics.

3200 registered voters are the sample.

All voters are population.