Acatalog 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.