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The mean deviation about mean of the obs...

The mean deviation about mean of the observation 3, 10, 10, 4, 7, 10, 5 is

A

2

B

2.57

C

3

D

3.75

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The correct Answer is:
B
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KUMAR PRAKASHAN-STATISTICS-NCERT EXEMPLAR PROBLEMS (OBJECTIVE TYPE QUESTIONS)
  1. The mean deviation about mean of the observation 3, 10, 10, 4, 7, 10, ...

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  2. Mean deviation for n observation x1,x2,……….,xn from their mean barx is...

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  3. When tested , the lives (in hours) of 5 bulbs were noted as follows : ...

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  4. Following are the marks obtained by 9 students in a mathematics test :...

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  5. The standard deviation of the data 6,5,9,13,12,8,10 is ……..

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  6. Let x1, x2 ,…………,xn be n observations and barx be their arithmetic mea...

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  7. The mean of 100 observations is 50 and their standard deviation is 5. ...

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  8. Let a,b,c,d,e be the observations with mean m and standard deviation S...

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  9. Let x1,x2, x3, x4, x5 be the observations with mean m and standard dev...

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  10. Let x1,x2,x3,………,xn be n observations . Let Wi = lxi + k for i=1,2,……,...

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  11. Standard deviations for first 10 natural numbers is

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  12. Consider the numbers 1,2,3,4,5,6,7,8,9,10 . If 1 is added to each numb...

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  13. Consider the first 10 positive integers . If we multiple each number b...

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  14. The following information relates to a sample of size 60: sum xi^2 = 1...

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  15. Coefficient of variation of two distributions are 50 and 60, and their...

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  16. The standard deviation of some centigrade (""^@C) temperature is 5. if...

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