Suppose That a Normal Model Describes the Acidity (PH) of Rainwater

question 78

Multiple Choice

Suppose that a Normal model describes the acidity (pH) of rainwater, and that water tested after
Last week's storm had a z-score of 1.8. This means that the acidity of that rain …

• A) had a pH 1.8 times that of average rainwater.
• B) varied with a standard deviation of 1.8.
• C) had a pH 1.8 higher than average rainfall.
• D) had a pH of 1.8.
• E) had a pH 1.8 standard deviations higher than that of average rainwater.

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