Statistics

Sampling Techniques
We prefer regression method when line passes through the origin:
True
False
Author: rikazzz Comment
Probability Distribution
Mean deviation of Negative Exponential distribution is:
?(1-?t)?^(-1)
1-e^(?-x/?_? )
2?e^(-1)
?^2
Author: rikazzz Comment
Measures of Dispersion
Given below the four sets of observations. Which set has the minimum variation?
46, 48, 50, 52, 54
30, 40, 50, 60, 70
40, 50, 60, 70, 80
48, 49, 50, 51, 52
Author: rikazzz Comment
Measures of Dispersion
The measures of dispersion can never be:
Positive
Zero
Negative
Equal to
Author: rikazzz Comment
Measures of Central Tendency
In symmetrical distribution, mean, median, and mode are:
Equal
Different
Zero
None of these
Author: rikazzz Comment
Corelation and Regression
If the coefficient of determination is 0.81, the correlation coefficient :
is 0.6561
could be either + 0.9 or – 0.9
must be positive
must be negative
Author: rikazzz Comment
Measures of Dispersion
If Y = ax ± b, where a and b are any two numbers but a 0, then M.D(Y) is equal to:
M.D(X)
M.D(X) ± b
a M.D(X)
M.D(Y) + M.D(X)
Author: rikazzz Comment
Measures of Central Tendency
The extreme values in negatively skewed distribution lie in the:
Middle
Right Tail
Left Tail
Whole Curve
Author: rikazzz Comment
Measures of Central Tendency
The middle value of an ordered array of numbers is the:
Mode
Mean
Median
Mid-Point
Author: rikazzz Comment
Statistical Inference
If the estimator utilizes all the observations of a sample then it is called a:
Positively biased
Negatively biased
Both A and B
None of these
Author: rikazzz Comment

Go to Page