The table shows signal-to-noise ratios recorded in a nuclear magnetic resonance experiment. Construct graphs of (a) signal-tonoise

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The table shows signal-to-noise ratios recorded in a nuclear magnetic resonance experiment. Construct graphs of (a) signal-tonoise ratio versus n and (b) signal-to-noise ratio versus √n, where n is the number of scans. Draw error bars corresponding to the standard deviation at each point. Is the signal-to-noise ratio proportional to √n? Find the 95% confidence interval for each row of the table.

Signal-to-noise ratio at the aromatic protons of 1% ethylbenzene in CCl4

Number of Number of Signal-to-noise Standard experiments accumulations ratio deviation 1 18.9 1.9 4 36.4 3.7 9. 47.3 4.9 8 16 66.7 7.0 25 84.6 8.6 36 107.2 10.7 49 130.3 13.3 64 143.2 15.1 81 146.2 15.0 100 159.4 17.1 606444

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