The average rice productivity in 2009 was 6 tonnes per hectare (ha), with a standard deviation of 0.9 tonnes.

If the area of rice fields is 100,000 hectares (ha) and rice productivity is normally distributed (tentative data).

From these data determine the following!

a. What is the area of rice fields that have a productivity of more than 8 tons?

b. What is the area of rice fields that have a productivity of less than 5 tons?

c. What is the area of rice fields that have a productivity of between 4-7 tons?

Chapter:Normal Distribution

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