In a random sample of 500 handwritten zip code digits, 466 were read correctly by an optical character recognition (OCR) system operated by the U.S. Postal Service (USPS). USPS would like to know whether the rate is at least 90% correct. Do the data provide evidence that the rate is at least 90% at $\alpha = 0.01$?
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Null hypothesis: The rate of correct readings by the OCR system is less than 90%. Alternative hypothesis: The rate of correct readings by the OCR system is at least 90%. Show more…
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In a random sample of 500 handwritten zip code digits, 466 were read correctly by an optical character recognition (OCR) system operated by the U.S. Postal Service (USPS). USPS would like to know whether the rate is at least $90 \%$ correct. Do the data provide evidence that the rate is at least $90 \%$ at $\alpha=0.05 ?$
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In a random sample of 500 handwritten zip code digits, 464 were read correctly by an optical character recognition (OCR) system operated by the U.S. Postal Service (USPS). USPS would like to check the claim that at least 90% of the zip codes can be correctly read. Formulate the null and alternative hypothesis
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