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.