Question 7: Find the minimum, maximum, median, and other quartiles.
Choose Analyze, Descriptive statistics, Frequencies. Choose FEV1 as the variable. Click Statistics, Quartiles, Minimum, Maximum, Median, Continue, OK.
You should get the following:
Statistics
FEV1 (litre)
|
N |
Valid |
57 |
| Missing |
0 |
|
|
Median |
4.1000 |
|
|
Minimum |
2.85 |
|
|
Maximum |
5.43 |
|
|
Percentiles |
25 |
3.5400 |
| 50 |
4.1000 |
|
| 75 |
4.5300 |
|
These are the quartiles as given in the lecture. I have actually got the median twice, labeled "Median" and "50".
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Last updated: 16 January, 2012.