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2 cards from this section. Quick, good the night before a test.
What is the Arithmetic Mean Method?
Think about how averages work.
How do you calculate the mean from three readings: 5 mm, 8 mm, and 12 mm?
Add the numbers first, then divide by how many there are.
What is the Arithmetic Mean Method used for?
Remember, it revolves around averages.
True or False: The Arithmetic Mean Method is the most accurate method for estimating rainfall in all scenarios.
Consider conditions of rainfall distribution.
You have rainfall readings of 15 mm, 22 mm, 10 mm, and 25 mm from four different gauges. If you were to use the Arithmetic Mean Method alone, would you be misled if one gauge showed an unusually high reading? Explain.
Think about how adding an extreme value affects averages.
A city uses the Arithmetic Mean Method to analyze rainfall data from a network of gauges. How would they need to proceed if they discovered one gauge was broken and had recorded zero rainfall?
Consider what impact a zero reading has on the overall average.
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