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Let there be two sets of observations. T...

Let there be two sets of observations. The first set contains 10 observations with mean 20. The second set contains 20 observations with mean 25. Find the mean of the combined set.

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UNITED BOOK HOUSE-Model Test Set - 9-Exercise
  1. What do you mean by Broca's Index?

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  2. Find the variance of the following observations : 30, 40, 50, 60, 70.

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  3. Let there be two sets of observations. The first set contains 10 obser...

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  4. Distinguish between primary and secondary data.

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  5. if P(A|B) = 1/3, P(A) = 1/4 and P(B) = 1/2, find the probability that ...

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  6. If P(A) = 0.2, P(B) = 0.3, P(C ) = 0.4 and A, B and C be independent t...

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  7. Write the axiomatic definition of probability?

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  8. Sum of the squares of deviation is least about

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  9. What do you mean by a cumulative frequency distribution. Point out its...

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  10. What is the value of Sheppard's correction of moments for m4?

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  11. For three unequal positive real numbers a, b, c show that (b + c) (c +...

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  12. If x1, x2,…….xn are real quantities. Prove that 1/n overset(n)underset...

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  13. First the greatest common divisor of 801 and 423.

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  14. State and prove Remainder theorem.

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  15. Show that if events A and B are independent, then so are A^c and B^c.

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  16. A Box contains 5 white and 3 black ball. One ball is drawn and it is s...

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  17. A box contains 7 white and 5 black balls two are drawn at random find ...

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  18. Define crude birth rate and point out its defects.

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  19. Explain the Time reversal and Factor reversal tests of index numbers.

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  20. What are different measures of skewness.

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