z zz interval using 99 % 99%99, percent confidence to estimate what proportion of silicon wafers at his factory are defective. He wants the margin of error to be no more than 3 % 3%3, percent. A previous study suggests that about 6 % 6%6, percent of these wafers are defective. If we assume p ^ = 0.06 p ^ ​ =0.06p, with, hat, on top, equals, 0, point, 06, what is the smallest sample size required to obtain the desired margin of error?