A catalog company promises to deliver online orders within 3 days of the order being placed. Follow-up calls were made to randomly selected customers to see whether their orders arrived on time (within 3 days). A 95% confidence interval for percentage of on-time arrival is 88% +/- 6%. What does this mean? Are these conclusions correct? Explain. a) 95% of all random samples of customers will show that 88% of orders arrive on time. b) 95% of all random samples of customers will show that 82% to 94% of orders arrive on time. c) we are 95% sure that between 82% and 94% of the orders placed by the sampled customers arrived on time. d) on 95% of the days, between 82% and 94% of the orders will arrive on time.