Paper: CSIR-NET June 2014 · Subject: Physical Chemistry · Chapter: Data Analysis · Topic: Error Propagation · Marks: 2 · Difficulty: Medium
For a set of 10 observed data points, the mean is 8 and the variance is 0.04 . The 'standard deviation' and the 'coefficient of variation' of the data are, respectively
(a)$0.005,0.1 \%$
(b)$0.02,0.2 \%$
(c)$0.20,2.5 \%$
(d)$0.32,1.0 \%$
Answer
Answer: C ✓ checked by 4AB · confidence high
Explanation
s = √0.04 = 0.20; coefficient of variation = 0.20/8 × 100 = 2.5 %.