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) range
B) median
C) correlation coefficient
D) standard deviation

Standard Deviation

An indicator of how much the values in a dataset spread out or differ from each other.

Normal Curve

A bell-shaped curve that represents the distribution of many types of data where most occurrences take place in the middle of the range.

Probability

The measure or estimation of how likely it is that an event will occur, expressed as a number between 0 (impossible) and 1 (certain).