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Q. The number of observations corresponding to a class is known as ………………..of that class.

Q. Cost of living index is known as

Q. The sum of squares of deviations from arithmetic mean is ………

Q. In a normal distribution Q.D = …………..

Q. When the correlation coefficient r = ±1, the two regression lines:

Q. In a binomial distribution, n =5 mean equals 2, what is the value of q?

Q. Histogram can be used to estimate……………

Q. Fishers ideal index is obtained as :

Q. In a basket there are 5 red balls and 3 black balls, what is the probability to select 2 balls from that in which one is black and one is red?

Q. The word statistics was used in…………..