Use the Following Information for Questions

Multiple Choice

Use the following information for questions:
A manufacturer of cell phones is interested in evaluating two alternative existing layout and flow path designs. Design 1 is the current one in use and Design 2 is a new proposed plan. Both designs were implemented for eight consecutive working days and the output of each design was recorded.
-How would a 90% confidence interval for the mean difference in output compare to the 95% confidence interval?

A) It would be wider.
B) It would be narrower.
C) It would stay the same.
D) You cannot tell until you look up the multiplier value.