statistics
posted by Shanae .
It is known that for a certain firm specializing in manufacturing female Tshirts, the ‘Small’ sizes have a shoulder size of 14 inches or less. If these Tshirt shoulder sizes are normally distributed with a mean of 16 inches and a standard deviation of 2 inches
(i)What proportion of manufactured Tshirt sizes will be ‘Small’?
(ii) In a random sample of 40 Tshirts manufactured by this firm, what is the probability that none will be ‘Small’?
(iii) What size of Tshirt will be greater than 80% of all the sizes produced?
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