Question

A newspaper provided a​ "snapshot" illustrating poll results from 1910 professionals who interview job applicants. The illustration showed that​ 26% of them said the biggest interview turnoff is that the applicant did not make an effort to learn about the job or the company. The margin of error was given as plus or minus 3 ±3 percentage points. What important feature of the poll was​ omitted?

a. confidence level
b. point estimate.
c. sample size
d. confidence interval

Answer 1

Answer: a. confidence level.

Explanation:

Given : A newspaper provided a​ "snapshot" illustrating poll results from 1910 professionals who interview job applicants.

i.e. Sample size : n= 1910

The illustration showed that​ 26% of them said the biggest interview turnoff is that the applicant did not make an effort to learn about the job or the company.

The point estimate of the proportion of job applicants said the biggest interview turnoff is that the applicant did not make an effort to learn about the job or the company = p=0.26

[Note : The point estimate of the population proportion is basically the sample proportion.]

The margin of error was given as plus or minus 3 ±3 percentage points.

But confidence level is necessary to describe the margin of error .

A confidence interval tells how sure you are about the margin of error .

Thus , the important feature of the poll was​ omitted = confidence level