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

Q. The second and fourth moments about mean are 4 and 48 respectively, then the distribution is:

Q. If the coefficient of determination is a positive value, then the regression equation:

Q. Index number calculated by Fisher's formula is ideal because it satisfy:

Q. If the sum of deviations from median is not zero, then a distribution will be:

Q. ____ is an extension of time reversal test

Q. If bxy and byx are two regression coefficients, they have:

Q. A time series consists of:

Q. In order to compare two series we can use

Q. . The average salary of a group of unskilled workers is 10,000 and for a group of skilled workers is 15,000. Combines salary is 12,000. What is the percent of skilled workers?