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 spread or variability of the data in a normal distribution. By calculating the standard deviation of the class lengths, Dominick would be able to estimate the likelihood of any given class lasting between 47 and 53 minutes, which represents a range of +/- 1 standard deviation from the mean (50 minutes).

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