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Q. If all the points of a scatter diagram lie on a straight line falling from left upper corner to the right bottom corner, the correlation is called...................

Q. The point of intersection of two regression lines is..........................

Q. A complete business cycle consists of a period of:

Q. A distribution consists of three components with total frequencies of 200, 250 and 300 having means 25, 10 and 15 respectively. Find the mean of the combined distribution.

Q. The median of the data 13, 15, 16, 17, 19, 20 is:

Q. If r is the simple correlation coefficient, the quantity ?2 is known as ...................

Q. Relative Method is further divided into how many types?

Q. The average to be used to determine the average size of the shoe sold in a shop is:

Q. In a moderately skewed distribution, the value of mode is 120 and that of median is 140. Find the value of arithmetic mean.

Q. The marks obtained by 9 students in a test are 25, 20, 15, 45, 18, 7, 10, 38 and 12. Find the median.