Explain what is the percent relative error

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The following data were obtained in order to determine the density of a cylindrical metal bar. Trial 1 2 3 Height (cm) 6.50 6.45 6.44 diameter (cm) 1.25 1.26 1.22 Mass (cm) 46.683 46.332 47.014 If the accepted value for the density of the bar is 6.70 g/cm3, what is the percent relative error? Please explain by showing work... Are these measurements more precise or more accurate? What is the purpose of repetition in measurements?

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