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The ratio of the number of atoms of the isotopes Ga-69 and Ga-71 in eight samples from different sources was measured in an effort to understand differences in reported values of the atomic mass of gallium.
sample Ga-69/Ga-711 1.526602 1.529743 1.525924 1.527315 1.528946 1.528047 1.526858 1.52793
Find thea) meanb) standard deviationc) varianced) write the mean and standard deviation together with an appropriate number of significant digits.
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