122 Chapter 2 Integers and Algebraic Expressions Checking Weather Predictions Materials: Internet access Estimated Time: 2–3 minutes each day for 10 days Group Size: 3 1. Go to a website such as http://www.weather.com/ to find the predicted high and low temperatures for a 10-day period for a city of your choice. 2. Record the predicted high and low temperatures for each of the 10 days. Record these values in the second column of each table. Predicted Actual Difference Day High High (error) 1 2 3 4 5 6 7 8 9 10 Predicted Actual Difference Day Low Low (error) 1 2 3 4 5 6 7 8 9 10 3. For the next 10 days, record the actual high and low temperatures for your chosen city for that day. Record these values in the third column of each table. 4. For each day, compute the difference between the predicted and actual temperature and record the results in the fourth column of each table.We will call this difference the error. 5. If the error is negative, does this mean that the weather service overestimated or underestimated the temperature? 6. If the error is positive, does this mean that the weather service overestimated or underestimated the temperature? error 1predicted temperature2 1actual temperature2 Group Activity
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