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The median of a set of 9 distinct observ...

The median of a set of 9 distinct observations is 20.5. If each of the largest 4 observations of the set is increased by 2, then the median of the new set

A

is decreased by 2

B

is two times the original median

C

remains the same as that of the original set

D

is increased by 2

Text Solution

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The correct Answer is:
C
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AAKASH SERIES-MEASURES OF DISPERSION (STATISTICS)-Exercise - I
  1. Mean of a set of numbers is bar(x). If each number is increased by lam...

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  2. The median of 5,19,14,6,8,9,12,13,21 is

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  3. The median of a set of 9 distinct observations is 20.5. If each of the...

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  4. Median of (x)/(5), x, (x)/(4), (x)/(2), (x)/(3) is 8. If x gt 0 then v...

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  5. The mean and median of 100 items are 50 and 52 respectively. The value...

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  6. Mode of the data 3,2,5,2,3,6,6,5,3,5, 2, 5 is

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  7. Mode of the following distribution is

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  8. If the difference between mean and mode is 63, then difference between...

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  9. If the mode of the data 25,15,20,25,18,14,15,18,16,20,25,20,x,18 is 25...

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  10. A data consists of two 2's, four 4's, six 6's three 8s', and 10. Then ...

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  11. The average value of the median of 2,8,3,7,4,6,7 and the mode of 2,9,3...

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  12. Geometric mean of 2, 2^(2), 2^(3),…,2^(n) is

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  13. If the Geometrical mean of x, 16, 50 is 20, then the value of x is

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  14. The reciprocal of the mean of the reciprocals of n observations is

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  15. The Harmonic mean of the numbers 2,3,4 is

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  16. If A.M. = 24.5, G.M. 24.375 then H.M. =

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  17. In problems on speed of a body, the average used is

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  18. The H.M. of the numbers 1/5, 1/10, 1/15, 1/20, 1/25, 1/30, 1/35 is

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  19. A man travels at a speed of 20 Km/hr. and then returns at a speed of 3...

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  20. The mean deviation from the mean for the set of observation -1, 0, 4 i...

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