If y falls within the 95% confidence limits, for a measured flow rate of 491 g/min, estimate the 95% confidence limits on the true flow rate.
a) 490.5 g/min to 491.5 g/min
b) 489.2 g/min to 492.8 g/min
c) 485.6 g/min to 496.4 g/min
d) 480.3 g/min to 501.7 g/min