Second moment about mean is_______________?

Related Mcqs:

1. If the third moment about mean is zero then distribution is_______________?

   A. Mesokurtic
   B. Positively Skewed
   C. Symmetrical
   D. Negatively Skewed

2. The second moment about mean is _____?

   A. Variance
   B. Mean
   C. S.D.
   D. Mode

3. Second moment about mean is always equal to _____________?

   A. S.D.
   B. C.V.
   C. Variance
   D. Square

4. If third moment about mean is equal to zero, then distribution is ______________?

   A. Negatively skewed
   B. Symmetrical
   C. positively skewed
   D. None of these

5. Random samples of size 17 are from a population that has 200 elements, a mean of 36, and a standard deviation of 8. which of the following best describes the from of the sampling distribution of the sample mean for this situation ?

   A. Approximately normal because the sample size is small relative to the population size
   B. Approximately normal because of the central limit theorem
   C. Exactly
   D. None of these alternatives is correct

6. Combine mean calculated by different given mean is ________?

   A. n1x1 + n2x2x + _____ nuxu/n1 +n2 + ___ + nu
   B. n1x1 + n2x2x + _____ nuxu/x1 + x2 + ____ x4
   C. n1x1 + n2x2x + _____ nuxu/n1 + n2 + ___+ nu
   D. ∑n1x/x1

7. If mean is 25 and standard deviation is 5 then C.V (Coefficient of variation) is_______________?

   A. 100%
   B. 25%
   C. 20%
   D. None of these

8. For a certain distribution if ∑(x−2)=18,∑(x−24)=0,∑(x−28)=−24) then arithmetic mean is_______________?

   A. 21
   B. 24
   C. 28
   D. 0

9. The mean deviation of the values, 18, 12, 15, is_______________?

   A. 6
   B. Zero
   C. 3
   D. 2

10. Mean deviation, Variance and Standard Deviation of the values 4,4,4,4,4,4 is_______________?

    A. 4
    B. 8
    C. 2
    D. 0