Doctors are interested in seeing what type of arch support helps the most to alleviate foot pain. Twenty five volunteers are asked to wear one type of arch support one week and rank their level of pain on a scale from one to ten. The next week, they wear another type of arch support and once again rank their pain. The type of arch support that each participant used the first week was randomly selected from the two types. Which arch support is better?

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