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Exercise
This problem is based on a “Nifty Assignment” by Steve Wolfman (http://nifty.stanford.edu/2006/wolfman-pretid). Consider lists of numbers from real-life data sources; for example, a list containing the number of students enrolled in different course sections, the number of comments posted for different Facebook status updates, the number of books in different library holdings, the number of votes per precinct, etc. It might seem like the leading digit of each number in the list could be 1-9 with an equally likely probability. However, Benford’s Law states that the leading digit is 1 about 30% of the time and drops with larger digits. The leading digit is 9 only about 5% of the time.
Write a program that tests Benford’s Law. Collect a list of at least 100 numbers from some real-life data source and enter them into a text file. Your program should loop through the list of numbers and count how many times 1 is the first digit, 2 is the first digit, etc. For each digit, output the percentage it appears as the first digit.
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