Question 1: Using SPSS, find the mean, standard deviation, and variance of FEV,
We can do this is several ways. For example, we can choose Descriptive Statistics, Descriptives, choose variable FEV1, Options. We then click Mean, Std deviation, Variance, Continue, OK.
This is what we get:
Descriptive
Statistics

N 
Mean 
Std. Deviation 
Variance 
FEV1 (litre) 
57 
4.0607 
.67153 
.451 
Valid N (listwise) 
57 



We can get the same information from Descriptive Statistics, Frequencies, choose variable FEV1, Statistics. We then click Mean, Std deviation, Variance, Continue, OK.
This produces:
Statistics
FEV1 (litre)
N 
Valid 
57 
Missing 
0 

Mean 
4.0607 

Std. Deviation 
.67153 

Variance 
.451 
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Last updated: 16 October, 2006.