A manufacturer claims that fewer than 6% of its fax machines are defective. In a random sample of 240 such fax machines, 12 are defective.
A) Find the sample portion of defective fax machine
B) Find the critical Z value that corresponds to a 92% confidence level, rounded to 2 decimal places
C) Construct a 92% confidence interval, rounding to 4 decimals places.
D) Find the margin of error E, rounded to 4 decimal places, for the 92% confidence interval.
E) Does the interval support the claim that less than 6% of the fax machines are defective? Yes or No. no explination needed