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11. Statistics
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Q9 of 37 Page 295

Calculate the variance of the following data


To find


Formula for


=


SD =


=


= 3.88


To find Variance


Variance = SD2


= 3.882 = 15.058


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7

Calculate the standard deviation of the following data.

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The number of books bought at a book fair by 200 students from a school are given in the following table.


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The time (in seconds) taken by a group of people to walk across a pedestrian crossing is given in the table below.


Calculate the variance and standard deviation of the data.

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Questions · 37
11. Statistics
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