document.write( "Question 1170819: 1.On average, which of the two eras had a higher number of screen changes (1990s or 2000s)?\r \n" );
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document.write( "1990s mean was 14.5270 \n" );
document.write( "2000s mean was 15.8241\r \n" );
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document.write( "I choose 2000s because the mean is higher. am I correct?\r \n" );
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