Answer :

In a normal distribution of scores, approximately 68 percent of all scores will occur within one standard deviation from the mean

Since a normal curve is  bell-shaped and  completely represented by its mean, mode, and standard deviation, Concerning the mean and standard deviation of a normal curve, we determine the approximate  proportion of data that falls within certain intervals., the empirical rule gives the solution  to it which is the 68-95-99.7% .The rule says that approx 68% of the data fall within one standard deviation of the mean and  95% of data fall within two standard deviations of the mean and at last99.7% of data fall within three standard deviations of the mean.

To know more about normal distribution refers to the link https://brainly.com/question/15103234?referrer=searchResults.

To know more about standard deviation refer to the link https://brainly.com/question/18511902?referrer=searchResults.

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