document.write( "Question 129644: Faced with rising fax costs, a firm issued a guideline that transmissions of 10 pages or more
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document.write( "should be sent by 2-day mail instead. Exceptions are allowed, but they want the average to be 10
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document.write( "or below. The firm examined 35 randomly chosen fax transmissions during the next year, yielding
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document.write( "a sample mean of 14.44 with a standard deviation of 4.45 pages. (a) At the .01 level of significance,
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document.write( "is the true mean greater than 10? (b) Use Excel to find the right-tail p-value.
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Algebra.Com's Answer #94647 by stanbon(75887)![]() ![]() ![]() You can put this solution on YOUR website! Faced with rising fax costs, a firm issued a guideline that transmissions of 10 pages or more \n" ); document.write( "should be sent by 2-day mail instead. Exceptions are allowed, but they want the average to be 10 or below. \n" ); document.write( "The firm examined 35 randomly chosen fax transmissions during the next year, yielding a sample mean of 14.44 with a standard deviation of 4.45 pages. \n" ); document.write( "(a) At the .01 level of significance,is the true mean greater than 10? \n" ); document.write( "Ho: mu = 10 \n" ); document.write( "Ha: mu > 10 \n" ); document.write( "-------------- \n" ); document.write( "t(14.44) = (14.44-10)/[4.45/sqrt(35)] = 4.44*sqrt(35)/4.45 = 5.9027... \n" ); document.write( "---------------- \n" ); document.write( "p-value = P(5.9027 \n" ); document.write( "Since the p-value is far less than alpha=1%, hasten to reject \n" ); document.write( "Ho. The test gives strong statistical evidence that the mean \n" ); document.write( "is not 10. \n" ); document.write( "You might conclude that the mean is greater than 10 since that \n" ); document.write( "is the alternative hypothesis. \n" ); document.write( "--------------- \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( "=============== \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( " \n" ); document.write( "(b) Use Excel to find the right-tail p-value. \n" ); document.write( " |