The area under any probability density function including the normal distribution must equal 1, as the sum of the probabilities of all outcomes must equal 1.
However, as the domain of outcomes goes from minus infinity to positive infinity, this fact is a theoretical one, and any practical problem will have cumulative probabilities less than 1.
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The area under the normal curve is ALWAYS 1.
The area is 0.008894
0.1972
50 percent.
0.0124