In an experiment to measure focal length of a concave mirror , the value of focal length in successive observations turns out to be `17.3` cm , 17.8 cm , 18.3 cm , 18.2 cm , 17.9 cm and `18.0` cm . Calculate the mean absolute error and percentage error . Express the result in a proper way .

What is the focal length of a concave mirror of radius of curvature 16.0 cm?

Radius of curvature of a concave mirror is 20 cm, then its focal length is ...... cm.

The focal length of a convex lens was measured a number of time.s The mean focal length was found to be 10.41 cm. If the mean absolute error in the value of focal length is 0.13 cm. Calculate the relative error and the percentage error.

Radius of curvature of a concave mirror is 24 cm. Then find the focal length of the mirror ?

If the radius of curvature of a concave mirror is 6.2 cm, its focal length is "________" cm.

Length of a sheet is 17.3+-0.3cm and breadth is 3.12+-0.08cm . Calculate the percentage error in the area.

The diameter of a wire as measured by a screw gauge was found to be 0.026 cm, 0.028 cm, 0.029 cm, 0.027cm, 0.024cm and 0.027 cm. Calculate (i) mean value of diameter (ii) mean absoulte error (iii) relative error (iv) percentage error. Also express the result in terms of absolute error and percentage error.

The diameter of a wire as measured by a screw gauge was found to be 0.026 cm, 0.028 cm, 0.029 cm, 0.027cm, 0.024cm and 0.027 cm. Calculate (i) mean value of diameter (ii) mean absoulte error (iii) relative error (iv) percentage error. Also express the result in terms of absolute error and percentage error.