Statistics

Measures of Dispersion
Calculate coefficient of variation c)V.) for the following data 2,4,8,6,10 and 12 is:
48.86
42.86
40.86
0.49
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Measures of Central Tendency
Statistics are aggregates of:
Methods
Calculations
Facts
Data
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Probability Distribution
?(1-ßt)?^(-a)is m.g.f of:
Uniform distribution
Beta distribution of kind II
Gamma distribution
Negative Exponential distribution
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Measures of Dispersion
The average of squared deviations about the arithmetic mean for a set of numbers is called:
Standard deviation
Coefficient of mean deviation
Mean deviation
Variance
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Statistical Inference
If prior density is given, for finding an estimate we use:
Baye’s method
MLE
Both A and B
None of these
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Corelation and Regression
When a multiple correlation coefficient r 1.2=1, then it shows :
Reasonably good relationship
Lack of linear relationship
Perfect relationship
None of these
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Probability Distribution
Which distribution is positively skewed:
Normal distribution
?2- distribution
t- distribution
None of these
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Statistical Inference
If X follows normal distribution. For the value of “ = 1”. ThenT = is an:
Complete
Unbiased
Both A and B
Sufficient
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Introduction to Statistics
Cumulative frequency is:
Decreasing
Increasing
Different
None of these
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Sampling Techniques
Regression model with stochastic term is called exact model:
True
False
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