| Date | None Specimen | Marks available | 2 | Reference code | SPNone.2.hl.TZ0.3 |
| Level | HL only | Paper | 2 | Time zone | TZ0 |
| Command term | Estimate | Question number | 3 | Adapted from | N/A |
Question
The heights of all the new boys starting at a school were measured and the following cumulative frequency graph was produced.
Complete the grouped frequency table for these data.
[2]
a.
Estimate the mean and standard deviation of the heights of these 80 boys.
[2]
b.
Explain briefly whether or not the normal distribution provides a suitable model for this population.
[2]
c.
Markscheme
A2
[2 marks]
a.
\(\mu = 1.26,{\text{ }}\sigma = 0.133\) A1A1
[2 marks]
b.
no because the normal distribution is symmetric and these data are not R2
[2 marks]
c.
Examiners report
[N/A]
a.
[N/A]
b.
[N/A]
c.
Syllabus sections
Topic 7 - Option: Statistics and probability » 7.1 » Cumulative distribution functions for both discrete and continuous distributions.
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