1. the dow jones industrial average closing prices for the bull market 1982-1986 were examined out of the 1112 trading days in that period, the average increased on 573 days. is the dow just as likely to increase as it is to decrease on any given day? 2. arthritis is a painful, chrommc inflammation of the joints. an experiment on the side effects of pain relievers examined arthritis patients to find the proportion of patients who suffer side effects when using ibuprofen to relieve the pain. if more than 3% of users suffer side effects, the food and drug administration will put a stronger waning label on packages of ibuprofen of the 440 subjects with chronic arthritis that were given ibuprofen for pain relief, 23 subjects suffered from adverse side eftfects does the fda need to put a stronger warning label on packages of ibuprofen?