The chart above shows a normal distribution. What percentage of the cases fall within the two lines showing the standard distribution between -1 and +1 on either side of the mean?

Question

Quizplus · Accepted Answer

The standard deviation of a normal distribution is such that approximately 68% of cases lie within 1 standard deviation of the mean. Therefore, the percentage of cases falling between the two lines representing -1 and +1 standard deviations will also be approximately 68%.

The Chart Above Shows a Normal Distribution