Assume that the masses of adult men can be modelled by the Normal distribution with mean 75 kg and standard deviation 5 kg.
The probability that an adult man, chosen at random, will have a mass greater
than 77.5 kg is
(4 d. p.)
The probability that an adult man, chosen at random, will have a mass between
76.6 kg and 83.5 kg is
(4 d. p.)
62% of adult men have a mass greater than
kg (1 d. p.)
The interquartile range for the masses of adult men is
kg (1 d. p.)