In a sample of 3200 registered voters 1440 or 45 approve of

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. The 45% approval is an example of

a.
a sample
b.
descriptive statistics
c.
statistical inference
d.
a population

Solution

Since (45%) 1440 approve out of 3,200 registered voters sample, so this proportion from the sample can be used to decide the proportion of total voters whether they will approve or not.

Hence The 45% approval is an example of c, statistical inference