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| Calculation of Standard Deviation for discrete series |
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| In the discrete series, when deviations are taken from actual mean, the formula is |
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| Example: |
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| From the following data, compute the value of standard deviations and variance. |
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| Suggested answer: |
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| Standard deviation from assumed mean method: |
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| Step 1: |
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| If a = assumed mean, then take the deviations of the items from a and call it d. |
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| Step 2: |
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| Step 3: |
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| Multiply each fd by the corresponding d to get fd2 and obtain S fd2. |
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| Step 4: |
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| Note : |
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| This method involves very less calculation than the deviation from actual method. |
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