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15. Statistics
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Q40 of 46 Page 278

Fill in the blanks

Coefficient of variation = s/mean x 100

Standard deviation

Explanation: We know Coefficient of variation can be written as



Where σ=standard deviation


=mean


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38

Coefficient of variation of two distributions are 50 and 60, and their arithmetic means are 30 and 25 respectively. Difference of their standard deviation is

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The standard deviation of some temperature data in °C is 5. If the data were converted into °F, the variance would be

41

Fill in the blanks

If is the mean of n values of x, then is always equal to _______.


If a has any value other than , then is _________ than.

42

Fill in the blanks

If the variance of a data is 121, then the standard deviation of the data is _______.

Questions · 46
15. Statistics
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