Mathematics - Leaving Certificate Examination - Sample Paper - 2012 Page 11
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20(c)
The heights in 2011 of Irish males born in 1992 are normally distributed with mean 178·8 cm
and standard deviation 7·9 cm.
(i)
Use the empirical rule to complete the following sentence:
“95% of nineteen-year-old Irish men are between ________ and ________ in height.”
(ii)
Use the empirical rule to make one other statement about the heights of nineteen-year-
old Irish men.
(d)
The male students in part (b) are a sample. The males in part (c) are a population. Is this is a
suitable population to compare the sample to? Give a reason for your answer.
Answer:
Reason:
(e)
Would you say that the males in the class are taller, smaller, or about the same as the
population? Use the data to justify your answer.
Answer:
Justification:
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Leaving Certificate 2012 – Sample Paper
Page 11 of 19
Project Maths, Phase 1
Paper 2 – Ordinary Level
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