for 342 observation,the rang is7.9cm,and the least count of the measuring instrument is 0.2cm calculate class-width
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The result of such a counting measurement is an example of an exact ... Every measurement has some uncertainty, which depends on the device ... number with the least number of significant figures (the least precise value in .... From Table 4 in Chapter 1.4 Measurements, the density of iron is 7.9 g/cm3, .... (a) 628 × 342.
Missing: observation, rank
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