140 migrating pigeons were caught by a biologist for data collection. The mass of these pigeons is normally distributed with mean 0.9 kg and standard deviation of deviation 0.15 kg.
a) Determine the percentile rank of a pigeon weighing 1kg.
b) What proportions of pigeons have weight greater than 1.1 kg or less than 0.7 Kg
Suppose only the top 20 % of marks on a university entrance exam qualifies an application for admission. If the test results had a mean of 400 and standard deviation of 25 what is the minimum score for admission? [31]
