and n = 10, then the coefficient of correlation is
0.1
0.3
0.2
Consider the following statementsi. Mode can be computed from histogramii. Median is not independent of change of scaleiii. Variance is independent of change of origin and scaleWhich of these is/ are correct?
only (1)
only (ii)
only (i) and (ii)
only (i), (ii) and (iii)
The values of mean, median and mode coincide, then the distribution is.
Positive skewness
Symmetric distribution
Negative skewness
All of the above
If var (x) = 8.25, var (y) = 33. 96 and cov (x,y) = 10.2 then the correlation coefficient is
0.89
-0.98
0.61
-0.16
If the mean deviation of number 1, 1 + d, 1 + 2d,.... 1 + 100 d from their mean is 255, then d is equal to.
10
20
10. 1
20. 2
The mean deviation from the mean of the set of observations -1, 0, 4 is
3
1
-2
2
For the given data, the calculation corresponding to all values of variates (x,y) is following.The karl Pearson's correlation coefficient is.
0. 2
0.5
0. 66
0. 33
If the coefficient of variation is 45% and the mean is 12, then its standard deviation is.
5.2
5.3
5.4
None of these
If the variance of 1,2,3,4, ... 10 is 99/12, then the standard deviation of 3, 6, 9, 12, .... 30 is
The mode of the series 3, 4, 2, 6, 1, 7,6 7, 6, 8, 9, 5 is.
5
6
7
8
