The area between z=0 and z=1 under the standard normal curve is ?
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According to the Empirical Rule, 68% of data lies within 1 std. dev. of the mean. Thus, between z=0 and z=1 lie half of that, or 34%, of the data.
Using a calculator for a more precise answer:
normalcdf(0,1) = 0.3413 (answer)