A Researcher Collected Data on the Annual Salary of Doctors

question 120

Multiple Choice

A researcher collected data on the annual salary of doctors in Nova Scotia.He wishes to construct a confidence interval for the mean annual salary.Which of the following is/are true?
I.A 98% confidence interval will have a greater chance of including the true mean salary than a 95% confidence interval.
II.A 98% confidence interval will be narrower than a 95% confidence interval.
III.A 98% confidence interval requires the researcher to take a larger sample.

• A)III
• B)II,III
• C)I
• D)II
• E)I,II