In a normal distribution,the probability of a score above -1.0 SD is equal to the probability of a score below +1.0 SD.

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In a normal distribution, about 68% of the scores fall within one standard deviation of the mean, which means 34% are above +1.0 SD and 34% are below -1.0 SD. Therefore, the probability of a score above -1.0 SD is equal to the probability of a score below +1.0 SD.

In a Normal Distribution,the Probability of a Score Above -1