In observations of equal precision, the most probable values of the observed quantities are those that render the sum of the squares of the residual errors a minimum, is the fundamental principle of

A. 1 cm B. 2 cm C. 3 cm D. 4 cm

A. Direct method B. Square method C. Cross-sections method D. Tachometric method

A. 750 mm × 900 mm B. 600 mm × 750 mm C. 450 mm × 600 mm D. 300 mm × 450 mm

A. 22° 30' B. 23° 27' C. 23° 30' D. 24° 0'