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Unit Problem<br />
Investigating Temperature Data<br />
The table shows the monthly lowest temperature, in degrees Celsius, in Edmonton.<br />
Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec.<br />
14.7 12.8 7.2 0.5 5.9 10.1 12.3 10.6 6.1 0.8 8.3 13.4<br />
1. Determine the mean monthly lowest temperature in Edmonton for that year.<br />
a) How did you use the order of operations in your calculation?<br />
b) Which months have temperatures below the mean? How do you know?<br />
Here are the monthly highest temperatures in Edmonton for the same year.<br />
Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec.<br />
5.8 2.9 2.1 10.6 17.2 20.7 23.4 22.2 16.7 9.8 1.1 4.3<br />
2. Determine the mean monthly highest temperature in Edmonton for that year.<br />
3. Choose three months. For each month, calculate the<br />
difference between:<br />
a) the mean monthly highest temperature and the<br />
monthly highest temperature<br />
b) the mean monthly lowest temperature and the monthly<br />
lowest temperature<br />
4. Some climatologists predict that, by the end of the century, due to<br />
global warming, the mean temperature will increase by between<br />
1.4°C and 11°C.<br />
a) How might the mean monthly highest temperature be affected?<br />
In what range could this temperature lie in 2100?<br />
b) Repeat part a for the mean monthly lowest temperature.<br />
Your work should show:<br />
• your calculations for the mean lowest and highest temperatures<br />
• your calculations of the differences in temperatures<br />
• the possible ranges for temperatures in the year 2100<br />
Reflect<br />
on Your Learning<br />
<strong>What</strong> is the most important thing you have learned<br />
about rational numbers? Explain why it is important.<br />
Unit Problem 147
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