document.write( "Question 258242: Faced with rising fax costs, a firm issued a guideline that transmissions of 10 pages or more should be sent by 2-day mail instead. Exceptions are allowed, but they want the average to be 10 or below. 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. (a) At the .01 level of significance, is the true mean greater than 10? (b) Use Excel to find the right-tail p-value. \n" ); document.write( "

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Faced with rising fax costs, a firm issued a guideline that transmissions of 10 pages or more should be sent by 2-day mail instead. Exceptions are allowed, but they want the average to be 10 or below. 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: u <= 10
\n" ); document.write( "Ha: u > 10
\n" ); document.write( "-----------------
\n" ); document.write( "Test statistic:
\n" ); document.write( "t(14.44) = (14.44-10)/[4.45/sqrt(35)] = 5.9028\r
\n" ); document.write( "\n" ); document.write( "(b) Use Excel to find the right-tail p-value.
\n" ); document.write( "The p-value = tcdp(5.9028,100,df=34) = 0.0000005758...
\n" ); document.write( "==============
\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
\n" ); document.write( " \n" ); document.write( "

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