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Q. A normal distribution requires two parameters, namely the mean and ..............

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

Q. If the correlation between the two variables , X and Y is negative, the regression coefficient of Y on X is .............................

Q. The sum of probabilities of all possible elementary outcomes of a random experiment is always equal to ...................

Q. The term regression was used firstly by .............................

Q. Regression lines are also called .........................

Q. If m is the coefficient of correlation, then the value of m2 is known as .................

Q. For a binomial distribution with probability p of a success and of q of a failure, the relation between mean and variance is .............................

Q. Mean Deviation (M.D) for normal distribution is equal to ......................

Q. If the ratio of change in one variable is equal to the ratio of change in the other variable, the correlation is said to be ..................................