A student measuring the diameter of a pencil of circular cross-section with the help of a vernier scale records the following four readings 5.50 mm, 5.55 mm, 5.45 mm ; 5.65 mm . The average of these…

Question

A student measuring the diameter of a pencil of circular cross-section with the help of a vernier scale records the following four readings 5.50 mm, 5.55 mm, 5.45 mm ; 5.65 mm . The average of these four readings is 5.5375 mm and the standard deviation of the data is 0.07395 mm . The average diameter of the pencil should therefore be recorded as

Accepted Answer

Correct answer: B. (b) d_ av=5.5375 mm d=0.07395 mm ∵Measured data are up to two digits after decimal ∴d= (5.54 0.07 )mm

Solution

More Units, Dimensions & Measurements PYQs