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4. A distribution of pH readings for soil samples can be approximated by a normal distribution with a mean of 6.00 and a standard deviation

4. A distribution of pH readings for soil samples can be approximated by a normal distribution with a mean of 6.00 and a standard deviation of 0.1. Round answers to two decimal places.

a. Show a labelled normal curve.

b. Find the probability that a pH reading exceeds 6.12.

c. Find the probability that a pH reading is at most 5.95.

d. At what pH value would you be at the 72nd percentile of pH values?

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