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?
A) mean
B) median
C) range
D) standard deviation

Question

Quizplus · Accepted Answer

The standard deviation is the statistic that measures the dispersion or variability of a dataset relative to its mean and is used in the context of a normal distribution to estimate probabilities within certain ranges from the mean. In this case, knowing the standard deviation would allow Dominick to estimate the probability of a class lasting between 47 and 53 minutes, assuming the class lengths follow a normal distribution.

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