A-4 Dispersion

1. S.D.=3.5, N=10, ∑m=145. The value of C.V. is------

• 20.13%
• 24.14%
• 35%
• 38.13%

2. If ∑d^2=488, ∑m=300, n=12, the S.D. is -------

• 6.38
• 64
• 6.92
• 1.27

3. If the value of a=41.58, z=45 and S.D.=15.30, the value of J will be------

• 0.22
• -3.42
• -0.22
• 3.42

4. H=90, L=10 then Co-efficient of Range will be-----

• 0.80
• 0.70
• 0.79
• 80

5. If J=0.63, a=34.24, z=30, then the value of S.D. will--

• 6.73
• 67.3
• 0.673
• 673

6. The C.V. of first group is 70% and the second group is 66.67%. The Uniform group in character is-----

• First
• Second
• Both
• None of the above

7. S.D.=6.4, Mean=25, the value of C.V. is-------

• 25.6
• 28.7
• 25
• 17

8. Co-efficient of skewness formula is ----

• J= a - z / S.D.
• J= m - z / S.D.
• J= a - m / S.D.
• None of the above

9. If a=123.14, z=123, S.D.=3.60, then Co-efficient of Skewness will be-----

• 0.04
• 0.40
• 4.0
• 40.0

10.If S.D. is 4, No. of item is 10 and Sum of the Item is 160, then Co-efficient of Variation will be-----

• 16
• 25
• 20
• 35