STATISTICAL TECHNIQUES AND TOOLS
MEASURE OF STANDARD DEVIATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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2
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N
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s2
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SSx
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Detailed explanation-1: -The sample variance is defined by(15.59)We use the symbol sx2 for a sample variance and the symbol x2 for a population variance.
Detailed explanation-2: -The variance is the the sum of squared deviations from the mean. The variance for population data is denoted by 2 (read as sigma squared), and the variance calculated for sample data is denoted by s2.
Detailed explanation-3: -The symbol ‘2’ represents the population variance.
Detailed explanation-4: -The symbol ‘2’ represents the variance of that random variable. The term called the chi square statistic will be represented by the statistical formula as X2=[(n-1)*s2]/ 2. The X2 is being represented as the chi square statistic. ‘n’ represents the size of the sample.