What conclusion can be made regarding the 95% prediction interval (820, 986) for the daily sales at a retail store that served 100 customers?
a. We are 95% confident that the mean sales on all days in which 100 customers are served will be between 820 and 986.
b. We are 95% confident that the sales on a particular day when 100 customers are served will be between 820 and 986.
c. The sales on a particular day when 100 customers are served lies between 820 and 886.2 with probability .95.
d. The sales on a randomly selected day in which 75 customers are served will be between 820 and 986 about 95% of the time.