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Q. The two regression lines coincide each other when r = .......................

Q. If the random variable of a probability distribution assumes specific values only, then it is called ...............................

Q. In correlation analysis, the formulae 1-r2 is used to compute the value of .......................

Q. Correlation analysis is a........................... analysis.

Q. Product moment correlation was developed by .......................

Q. The techniques which provide the decision maker a systematic and powerful means of analysis to explore policies for achieving predetermined goals are called.................

Q. If plotted points in a scatter diagram lie on a straight line vertical to the Y-axis, then r=.........

Q. If X and Y are independent , the value of regression coefficient byx = ....................

Q. When the feasible region is such that the value of objective function can extended to infinity, it is called a case of ------------

Q. Mean and variance of Poisson distribution is equal to ...............................