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The mean and standard deviation of marks...

The mean and standard deviation of marks obtained by 50 students of a class in three subjects , mathematics ,Physics and Chemistry are given below :
Which of the three subject shows the highest variability in marks and which shows the lowest?

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MAXIMUM PUBLICATION-STATISTICS-EXAMPLE
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  6. Find the mean deviation about the median for the following data:

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  8. Find the mean deviation about the mean for the following data:

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  12. Find the variance and standard deviation of 3,4,6,5,5,3,8,1,7,5 .

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  16. The sum and squares corresponding to length x(in cm) and y(in gm) of 5...

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  18. Consider the numbers 4,7,8,9,10,12,13,17 Find the mean of the number...

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  19. Consider the number 4,7,8,9,10,12,13,17 Find the mean deviation abou...

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  20. Consider the numbers 4,7,8,9,10,12,13,17 Find the standard deviation...

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