Lauren enrolled in a very large college calculus
class. on the first exam, the class mean was 75 and
the standard deviation was 10. on the second
exam, the class mean was 70 and the standard
deviation was 15. lauren scored 85 on both
exams. assuming the scores on each exam were
normally distributed, on which exam did lauren
score better relative to the rest of the class?

The fraction of defective integrated circuits produced in a photolithography process is being studied. a random sample of 300 circuits is tested, revealing 17 defectives. (a) calculate a 95% two-sided confidence interval on the fraction of defective circuits produced by this particular tool. round the answers to 4 decimal places. less-than-or-equal-to p less-than-or-equal-to (b) calculate a 95% upper confidence bound on the fraction of defective circuits. round the answer to 4 decimal places. p less-than-or-equal-to