The following graph shows the distribution of the mid upper arm circumferences of 120 female biomedical sciences, medical, nursing, physiotherapy, and radiography students:
1. What kind of variable is arm circumference?
2. What kind of graph is this?
3. Where are the mode, the lower tail and the upper tail of this distribution?
4. How would you describe the shape of the distribution and why?
5. From the graph, approximately what would you estimate the median and the first and third quartiles to be? Where would they appear along the horizontal axis?
6. From the graph, approximately what would you estimate the mean and the standard deviation to be? Where would they appear along the horizontal axis?
The following table shows eye colour, as recorded by another student, for male and female students:
Eye colour | Sex | Total | |
---|---|---|---|
female | male | ||
black | 6 | 4 | 10 |
brown | 47 | 32 | 79 |
blue | 27 | 17 | 44 |
grey | 10 | 1 | 11 |
hazel | 9 | 5 | 14 |
green | 16 | 4 | 20 |
other | 4 | 1 | 5 |
missing | 1 | 0 | 1 |
Total | 120 | 64 | 184 |
7. What kind of variable is eye colour? What kind of variable is sex?
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Last updated: 23 July, 2006.