document.write( "Question 872533: A simple random sample of 25 cigarettes has a mean tar content of 19.2 and a standard deviation of
\n" ); document.write( "4.27. Use a 5% signifiance level to test the claim that the mean tar content is less than 21.1
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Algebra.Com's Answer #526203 by ewatrrr(24785) $\"\"$ $\"About$

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document.write( "Hi\r
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document.write( "sample 25, mean = 19.2, sd = 4.27
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document.write( "Ho: x  ≥  21.1
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document.write( "Ha: x < 21.1 claim
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document.write( "t = (19.2 - 21.1)/(4.27/sqrt(25) = -1.9/.854 = -2.225
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document.write( "p-value(t < -2.225) (df = 24) = .0179
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document.write( "Reject Ho, The claim that x < 21.1 is valid  (.0179 < .05) \n" );
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