The following are given in relation to a frequency distribution;∑f = 50, ∑fx =1,610, ∑(fx)2 = 61,250.The mean, variance and standard deviation of this frequency distribution are; (3) * a) 50.00, 1,225.00 and 35.00 b) 32.20, 188.16 and 13.72 c) 32.20, 1,225.00 and 35.00 d) 32.20, 1,225.00 and 2.80
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Statistics
Variance and Standard Deviation
A measure of dispersion is important for statistical analysis. Such concepts find extensive applications in disciplines like finance, business, accounting etc. We rely a lot on such measures from analyzing a stock to studying a student’s performance. We now know about range and mean as measures of dispersion. Now let us study the most widely used tools in the dispersion toolbox- Variance and Standard Deviation.
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