what is the probability of randomly selecting a value between -2.555 and -0.745?

In a standard normal distribution, what is the probability of randomly selecting a value between -2.555 and -0.745? Round to four decimal places.
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I assume these are z scores. The probability for -2.555 is 0.0053 and for -0.745 is 0.2281. Therefore the probability for the range is 0.2281-0.0053=0.2228 (22.28%).

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