The Internal Revenue Service estimates that 8% of all taxpayers filling out long forms make mistakes.(a) An IR?

Stats The Internal Revenue Service estimates that 8% of all taxpayers filling out long forms make mistakes.(a) An IRS employee starts to randomly select forms—one at a time—to check for mistakes. What is the probability that the first form with mistakes is the 7th one she checks?(b) The same IRS employee... show more Stats
The Internal Revenue Service estimates that 8% of all taxpayers filling out long forms make mistakes.(a) An IRS employee starts to randomly select forms—one at a time—to check for mistakes. What is the probability that the first form with mistakes is the 7th one she checks?(b) The same IRS employee announces at lunch one day that she checked 25 forms this morning and didn’t find mistakes on any of them. Is this surprising enough so that her supervisor should worry about whether she is missing errors? Explain.
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