Question

The number of televisions sold in each day of a week are 13,8,4,9,7,12,10.Find it's standard deviation

Answer 1

Answer:

Direct Method

Note

· While computing standard deviation, arranging data in ascending order is not mandatory.

· If the data values are given directly then to find standard deviation we can use the formula σ =

· If the data values are not given directly but the squares of the deviations from the mean of each observation is given then to find standard deviation we can use the formula σ =

Answer 2

Answer:

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