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Monthly Archives: November 2011
Which Car Rental Company Is More Expensive, Budget or Avis?
Any “budget” conscious consumer/traveler would want to find a good deal wherever and whenever he or she can, especially when it comes to airfare and rental cars. In tough economic times, bargain hunting is the norm rather the exception. This … Continue reading
Posted in Sampling Distributions, Statistical Inference, Statistics
Tagged Alternative Hypothesis, Confidence Interval, Descriptive statistics, Introduction to statistics, Introductory statistics, Matched Pairs ttest, Null Hypothesis, OneSample tProcedures, OneSample ttest, pvalue, Statistical Inference, ttest
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Benfordâ€™s Law and US Census Data, Part II
The Benford’s law is a probability model that is a powerful tool for detecting frauds and data irregularity. The first digit (or leading digit) of a number is the leftmost digit and can only be 1, 2, 3, 4, 5, … Continue reading
Posted in Probability, Statistical Inference, Statistics
Tagged Alternative Hypothesis, Benford's Law, Chisquare goodness of fit, Chisquare statistic, Chisquare test, Introduction to statistics, Introductory statistics, Null Hypothesis, pvalue, Statistical Inference, Tests of Significance
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Benford’s Law and US Census Data, Part I
The first digit (or leading digit) of a number is the leftmost digit (e.g. the first digit of 567 is 5). The first digit of a number can only be 1, 2, 3, 4, 5, 6, 7, 8, and 9 … Continue reading
Is It Possible to Spot Fraudulent Numbers?
People engage in financial frauds have a need to produce false data as part of their criminal activities. Is it possible to look at the false data and determine they are not real? A probability model known as the Benford’s … Continue reading