document.write( "Question 321504: A sociologist wants to determine if the life expectancy of people in Africa is less than the life expectancy of people in Asia. The data obtained is shown in the table below.\r \n" );
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document.write( " Africa \n" );
document.write( "X 63.3 \n" );
document.write( "σ 9.1 \n" );
document.write( "n 120 \r \n" );
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document.write( " Asia \n" );
document.write( "X 65.2 \n" );
document.write( "σ 7.3 \n" );
document.write( "n 150\r \n" );
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document.write( "What is the null hypothesis? Use α = 0.05.\r \n" );
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document.write( "Am I right in saying the null hypothesis is Ho: u1 = u2 or is it Ho: u1 >_ u2 \n" );
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