A machine produces components whose masses are normally distributed with a mean and standard deviation of u and o respectively. If 10.2% of the components have a mass greater than 87g and 2.94% have a mass less than 83.5g Determine the: (i) (ii) (i) mean u standard deviation 0. Probability of components with mass between 84.5 g and 86.1 g (8 marks)

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