The filling machine used by a dairy company tofill 1kg containers of yoghurt produces output which follows a normal distribution with mean 1030g (slightly more than1kg) and standard deviation 20g.
Supposuppose that the company canchange either the mean or the standard deviation of the filling amount (but notboth). If they require the probabilityof underfilling a container (i.e. contents less than 1000g) to equal 0.05, find
(i) the smallest value of the mean; and
(ii) the largest value of the standard deviation
that satisfies thisrequirement (in each case to the nearest gram).