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The diameter of a spherical bob, when measured with vernier callipers yielded the following values: 3.33 cm, 3.32 cm, 3.34 cm, 3.33 cm and 3.32 cm. The mean diameter to appropriate significant figures is:
A
3.328 cm
B
3.3 cm
C
3.33 cm
D
3.32 cm
Detailed Solution
Mean diameter $=\dfrac{d_1+d_2+d_3+d_4+d_5}{5}=\dfrac{3.33+3.32+3.34+3.33+3.32}{5}=3.328\approx3.33$ cm (rounded to the appropriate number of significant figures matching the individual readings).