48.1 When analyzing soils for zinc content in five samples of one sample, the following results were obtained, %: a) 8.5⋅10-3; 9.2⋅10-3; b) 10.4⋅10-3; 10.9⋅10-3;
c) 7.2⋅10-3; 7.3⋅10-3; d) 9.4⋅10-3; 8.9⋅10-3; e) 7.3⋅10-3; 6.7⋅10-3; Calculate the standard deviation in determining the zinc content (for α=0.95).

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