document.write( "Question 189573: For certain group of individuals, the average cost of a trip to the super bowl was $875. The standard deviation for the population was $50. This year, 20 fans who scheduled the trip paid an average of $890. Test the claim that the average cost has gone up to attend the super bowl. Use a 0.04 level of significance? \n" ); document.write( "

Algebra.Com's Answer #142451 by stanbon(75887) $\"\"$ $\"About$

You can put this solution on YOUR website!
For certain group of individuals, the average cost of a trip to the super bowl was $875. The standard deviation for the population was $50. This year, 20 fans who scheduled the trip paid an average of $890. Test the claim that the average cost has gone up to attend the super bowl. Use a 0.04 level of significance?
\n" ); document.write( "-------------------------
\n" ); document.write( "Ho: u = 875
\n" ); document.write( "Ho: u > 875
\n" ); document.write( "--------------------------------
\n" ); document.write( "z(890) = (890-875)/[50/sqrt(20)] = 1.3416
\n" ); document.write( "p-value = P(t>1.3416 with df=19) = 0.0185
\n" ); document.write( "------------
\n" ); document.write( "Conclusion:
\n" ); document.write( "Since the p-value is less than 4%, reject Ho.
\n" ); document.write( "The test results support the claim that the average cost is up.
\n" ); document.write( "=============================================================
\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H. \n" ); document.write( "

\n" );