Question

A sample of 80 Chief Financial Officers revealed 20 had at one time been dismissed from a job. Develop a 94 percent confidence interval for the proportion that has been dismissed from a job

Answer 1

A sample of 80 chief financial officers revealed that 20 had one time been dismissed from a job.

We have to develop a 94% confidence interval for the population proportion that has been dismissed from a job.

Now,

The z-value for 94% confidence interval is z=1.88

The sample size is n=80

The sample proportion is p=20/80=0.25

Now, we know that the 94% confidence interval is given by

So, the 94% confidence interval is (0.159,0.341).