AP PSYCHOLOGY

Detailed explanation-1: -It’s basically the same as the first instance, only this time we’re looking at two standard deviations above and below the mean. For any normal distribution, approximately 95 percent of the observations will fall within this area.

Detailed explanation-2: -This rule tells us that around 68% of the data will fall within one standard deviation of the mean; around 95% will fall within two standard deviations of the mean; and 99.7% will fall within three standard deviations of the mean.

Detailed explanation-3: -The 68-95-99 rule 95% of the population is within 2 standard deviation of the mean. 99.7% of the population is within 3 standard deviation of the mean.

Detailed explanation-4: -Around 95% of values are within 2 standard deviations of the mean. Around 99.7% of values are within 3 standard deviations of the mean.

Detailed explanation-5: -68% of the area of a normal distribution is within one standard deviation of the mean. Approximately 95% of the area of a normal distribution is within two standard deviations of the mean.