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OLga [1]
2 years ago
7

The average amount of ozone in several cities across Pennsylvania was correlated with the average number of asthma cases in thos

e cities. What type of study is this
Mathematics
1 answer:
bekas [8.4K]2 years ago
3 0

Answer:

Ecological study

Step-by-step explanation:

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insens350 [35]

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none of the two graphs in the pic.

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How do you find magnitude of a vector
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