. Report for ... on the Lancashire Sea-Fisheries Laboratory at the University of Liverpool, and the Sea-Fish Hatchery at Piel. 1-50 is only one part of the w^hole range,which is about 46 to 59, and our methods of collecting are such 183 that we cannot, in general, always take the same proportion offish from this range in every sample. We assume that thedivergence of any one frequency from the mean in our series ofsamples conforms to the normal law of error (given by theGaussian curve). We might get 19, 23, 24, 26 or 28 in any onesample, but there would be a tendency for the majority of thesefr
. Report for ... on the Lancashire Sea-Fisheries Laboratory at the University of Liverpool, and the Sea-Fish Hatchery at Piel. 1-50 is only one part of the w^hole range,which is about 46 to 59, and our methods of collecting are such 183 that we cannot, in general, always take the same proportion offish from this range in every sample. We assume that thedivergence of any one frequency from the mean in our series ofsamples conforms to the normal law of error (given by theGaussian curve). We might get 19, 23, 24, 26 or 28 in any onesample, but there would be a tendency for the majority of thesefrequencies to cluster round the mean (say round 24). Next take the series for July, when the frequency forD = 51-25—51-50 is 12. If we had had a number of samplesinstead of the single one we would have found/= 9,10,12,14,15(or some such numbers) and these latter frequencies would alsohave tended to cluster round their mean (say round 12). If wereduce the two series of frequencies to percentages of thetotals and then replace them by theoretical ones and drawcurves we should get some such figure as Fig. a. Here there Jove.
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectfisheries, bookyear18
