3You and your friend have been assigned the project of estimating the average shareholder return of the companies in the Consumer Products industry.You both independently work on the project and each get different samples of data.Naturally, your 95% confidence interval is not the same as your friend's since you used different samples.

After the project your tutor asks you how you could use the information that you both have to make a better confidence interval for the average shareholder return.

Select one:

a.

Take both random samples and combine the information (deleting duplicates). Construct a 95% confidence interval based on the combined data.

b.

Take the average of the two intervals.

c.

Use your interval, since you obviously are smarter than your friend.

d.

Use the interval that utilized the larger sample size.