Home xin At present, there are three automatic packaging machines, which pack 100 grams of drugs per bag. In order to understand their quality, we will conduct sampling survey on the products they pack

At present, there are three automatic packaging machines, which pack 100 grams of drugs per bag. In order to understand their quality, we will conduct sampling survey on the products they pack

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according to the three frequency step-by-step histograms,
the first group of data is unimodal, and the difference between each small rectangle is relatively small. The number distribution is uniform and normal, and the variance is smaller than that in the third group of data.
there are more numbers at both ends of the second group of data, most of which are at both ends. The data deviates from the average far and is the most dispersed, so its variance is the largest,
Most of the data in the third group are around the average, and the data are the most concentrated, with small variance
in general, we know that s b> s c> s a,
so the answer is: A, C and B.

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