送交者: skipper3 于 2006-3-18, 19:47:50:
回答: within three standard deviation 由 xj 于 2006-3-18, 18:02:27:
This is extremely low probability event, so approximation using normal distribution is inappropriate. There is definitely more adult people who can lift 79kg than those who can't life 1kg, and even more people who can lift 79.9kg than those who can't handle 0.1kg.