document.write( "Question 717083: Please help with this calculation, please show full workings. Many thanks.\r \n" );
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document.write( "The president of a company that manufactures air conditioners is considering switching his supplier of condensers. Supplier A, the current producer of condensers for the manufacturer, prices its product 5% (percent) higher than supplier B does. Because the president wants to maintain his company's reputation for quality, he wants to be sure that Supplier's B condensers last as least as long as Supplier A's condensers. After a careful analysis, the president decided to retain supplier A if there is sufficient statistical evidence that supplier A's condensers last longer, on average than Supplier B's condensers. In an expirement, 15 randomly-selected midsize cars were equipped using type-A condensers while another 15 randomly-selected midsize cars were equipped with type-B condensers. The number of kilometers (in thousands) driven by each car before the condenser broke down is displayed in the table below.\r \n" );
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document.write( "Carry out a hypothesis test, at 5% (percent) significance level, to determine whether the president should retain supplier A.\r \n" );
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document.write( "The numbers below from Supplier A and Supplier B are corresponding. I cant do them next to each other then it squashes them all together. Not sure why.\r \n" );
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document.write( "Supplier A \r \n" );
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document.write( "156 \n" );
document.write( "146 \n" );
document.write( "93 \n" );
document.write( "152 \n" );
document.write( "80 \n" );
document.write( "111 \n" );
document.write( "107 \n" );
document.write( "118 \n" );
document.write( "115 \n" );
document.write( "125 \n" );
document.write( "108 \n" );
document.write( "97 \n" );
document.write( "142 \n" );
document.write( "160 \n" );
document.write( "102 \r \n" );
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document.write( "Supplier B\r \n" );
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document.write( "109 \n" );
document.write( "75 \n" );
document.write( "131 \n" );
document.write( "131 \n" );
document.write( "129 \n" );
document.write( "147 \n" );
document.write( "78 \n" );
document.write( "124 \n" );
document.write( "86 \n" );
document.write( "127 \n" );
document.write( "111 \n" );
document.write( "146 \n" );
document.write( "114 \n" );
document.write( "136 \n" );
document.write( "98\r \n" );
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