The following table gives a number of Rockwell G hardness values that were measured on a single steel specimen. Compute average and standarddeviation hardness values.
47.3 | 48.7 | 47.1 |
52.1 | 50.0 | 50.4 |
45.6 | 46.2 | 45.9 |
49.9 | 48.3 | 46.4 |
47.6 | 51.1 | 48.5 |
50.4 | 46.7 | 49.7 |
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