The table below lists leading digits of 317 inter-arrival Internet traffic times for a computer, along with the frequencies of leading digits expected with Benford's law (from Table 11-1 in the Chapter Problem).
a. Identify the notation used for observed and expected values.
b. Identify the observed and expected values for the leading digit of 2.
c. Use the results from part (b) to find the contribution to the x2 test statistic from the category representing the leading digit of 2.

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Leading Digit Benford's Law Leading Digits of Inter-Arrival Traffic Times 76 62 2933 19 27 28 21 22 2 3 4 5 6 30.1%, 17.6%, 12.5%, 9.7% | 7.9% | 6.7% | 5.8% | 5.1% | 4.6%