learning standard deviation formula

Standard Deviation of a statistical data is defined as the positive square root of the arithmetic mean of the squared deviations of items from their arithmetic mean of the series under consideration. The standard deviation is denoted b..

of a statistical data is defined as the positive square root of the arithmetic mean of the squared deviations of items from their arithmetic mean of the series under consideration. The standard deviation is denoted by s (sigma). The standard deviatio..

From the graph, the standard deviation is _____. => 14.5 or 9 or 3 or 10..

In this series too deviations may be taken either from the actual mean or from standard mean. The calculations will be simplified if the deviation are taken from assumed mea..

Merits: s is based on every item of the data. s takes care of both positive and negative deviation. Demerits: s is some what not easy to understand. The extreme values unduly affect s..

In the discrete series, when deviations are taken from actual mean, the formula ..

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Give the control limits for 2 standard deviations around the mean, if the mean is 50 and standard deviation is 2. => 46, 92 or 44, 56 or 46, 54 or 48, 52..

What will happen to the variance and standard deviation of a data set if each numerical data is doubled? => Both would be doubled. or Variance increases by 3 times and standard deviation is doubled. or Variance is doubled and standard deviation..

To calculate the confidence interval for variance or standard deviation, a statistical distribution called ______ is needed. => chi-square distribution or binomial distribution or poisson distribution or multinomial distribution..