What percent of storms produce rainfall with ph under 4

Reference no: EM131394566

Based on long-term investigation, researchers have suggested that the acidity (pH) of rainfall in the Shenandoah Mountains can be described by the Normal model N(4.9, 0.6).

a) Draw and carefully label the model.

b) What percent of storms produce rainfall with pH over 6?

c) What percent of storms produce rainfall with Ph under 4?

d) The lower the pH, the more acidic the rain. What is the pH level for the most acidic 20% of all storms?

e) What is the pH level for the least acidic 5% of all storms?

f) What is the IQR for the pH of rainfall?

Reference no: EM131394566

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