a. Calculate a range of values that contains almost all (approximately 99.73 percent) of the individual grapefruit weights.
b. Find a reasonable estimate of the maximum weight of a grapefruit that the grocer is likely to sell.
c. Suppose that the grocer's contract with its produce supplier specifies that grapefruits are to weigh a minimum of .75 lb. Is this lower specification being met? Explain. Note here that there is no upper specification, since we would like grapefruits to be as large as possible.
d. If the lower specification of .75 lb. is not being met, estimate the fraction of grapefruits that weigh less than .75 lb. Hint: Find an estimate of the standard deviation of the individual grapefruit weights.