# Find the mean and standard deviation.

**Question description**

The American Mineralogist (October 2009) published a study of the evolution of uranium minerals in the Earth’s crust. Researchers estimate that the trace amount of uranium x in reservoirs follows a uniform distribution ranging between 1 and 3 parts per million. (Round to three decimal places as needed.)

(1) Find the mean and standard deviation.

(2) Compute P(2 < X < 2.5)

(3) Compute P(X < 1.75)

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