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A scientist wants to predict the number of nitrates in the river. Which sample is better for making this prediction?
Sample A: A random sample of 5 gallons of water from one location in the river
Sample B: A random sample of 5 gallons of water from five different locations in the river

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Answer:

Sample B: A random sample of 5 gallons of water from five different locations in the river

Step-by-step explanation:

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