Question

With any set of scores that is normally distributed what percentage of the total area falls,

1. between the mean and a score that lies one standard deviation below the mean?

2. above a score that lies one standard deviation below the mean and one standard deviation above the mean?

3. between a score that lies two standard deviations below the mean and two standard deviations above the mean?​

Answer 1

1.) Approximately 68%We can summarize use of the standard deviation as a yardstick with the Empirical Rule, also known as the 68-95-99.7% Rule. In any normal distribution with mean μ and standard deviation σ : Approximately 68%of the data fall within one standard deviation of the mean.

Explanation: