Although Dominick's psychology class is sometimes longer or shorter than usual,on average each class is 50 minutes. If the lengths of these classes form a normal curve,which statistic would enable Dominick to estimate the probability that any single class will last somewhere between 47 and 53 minutes?

Question

Quizplus · Accepted Answer

The standard deviation is a measure of the variability or spread of a set of data. In a normal distribution, approximately 68% of the data falls within one standard deviation of the mean. Therefore, by knowing the mean (50 minutes) and the standard deviation, Dominick can estimate the probability that any single class will last between 47 and 53 minutes using the empirical rule.

Although Dominick's Psychology Class Is Sometimes Longer or Shorter Than