During a 5 day period a florist served a different number of customers at a flower shop each day The mean number of daily customers served during this period was 17 In the following month during another 5 day period the florist served 16 customers per day for four of the days but served 25 customers on the fifth day What is the difference between the mean number of customers the florist served during each of the two five day periods Adapted from Khan Academy 00 O 0 8 O 1 0