Which of the following can be the coefficient of correlation 'r', between two variables?

Which of the following is true, if A and B are mutually exclusive?

If the same quantity is added to a set of data, its standard deviation

Probability for occurrence of two events together is expressed by

Number of arangments that can be made using the word “both”, with or without meaning and with repetition in forming 4 lettered words is

If f(x) = x + 2, find f(1/x).

If same quantity is subtracted from all entries, arithmetic mean will

The sum of the terms 3, 0, - 3, - 6, - 9, …. 50 is equal to

The slope of a line joining the points (2,1) and (3,4) is

Point estimate is

What is the probability that each letter is put in a different cover, if there are 3 letters and 4 covers?

The distance of origin from the line x + y = 9 is

The relation “is mother of” over a set of family members is a relation that is

A good estimator exhibits

The chart which shows logarithm of a variable is known as