You have been told that your planned full-factorial designed experiment is too expensive. Which of the following is the PREFERRED option?

A	Replicate the results
B	Use a fractional factorial design
C	Use aliasing and/or confounding
D	All of the above

#79

A sample size of 28 was used to test a two-tail hypothesis about a population mean. Which is the confidence level of the hypothesis test for a known critical value of t = 2.052? Caution: Think it through.

A	95%
B	97.5%
C	99%
D	90%

#80