• 29. For one school week, Hannah recorded the following temperatures, in degrees Fahrenheit, so she could investigate the difference between the high and low temperature each day.

Day
Monday Tuesday Wednesday Thursday Friday
Low High
−3° 26° −5° 32° −7° 22° 03° 40° 02° 40°

To the nearest degree, what was the mean of the differences in daily high and low temperatures for these 5 days?
    Choice E

    Difference between the high and low temperature of Monday $=26°-(-3°)=29°$;

    Difference between the high and low temperature of Tuesday $=32°-(-5°)=37°$;

    Difference between the high and low temperature of Wednesday $=22°-(-7°)=29°$;

    Difference between the high and low temperature of Thursday $=40°-3°=37°$;

    Difference between the high and low temperature of Friday $=40°-2°=38°$;

    Therefore, the mean of the differences $=\frac{29°+37°+29°+37°+38°}{5}=34°$