Michael wittry has been investing in his roth ira retirement account for 20 years. two years ago, his account was worth $215,658. after losing 1/3 of its original value, it then gained 1/2 of its new value, it then gained 1/2 of its new value back. what is the correct value of his roth ira?

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