Q 71. The coefficient of correlation between the regression coefficients is:

Q 72. The regression coefficients re independent of change of origin but:

Q 73. If one of the regression coefficient is greater than unity, the other must be:

Q 75. The range of the scores 29, 3, 143, 27, 99 is:

Q 76. In quality control of manufactured items, the most common measure of dispersion is:

Q 77. The measure of dispersion which uses only two observations is called:

Q 78. The measure of dispersion which uses only two observations is called:

Q 79. Which of the following is an absolute measure of dispersion?

Q 80. Given below the four sets of observations. Which set has the minimum variation?