On average,Caryl's school bus arrives on time,although sometimes it is a bit early or late.If the arrival times are distributed on a normal curve,which of the following statistics would enable Caryl to estimate the probability that her bus will arrive within 5 minutes of its scheduled arrival time on any given day?
A) median
B) mean
C) standard deviation
D) correlation coefficient

Question

Quizplus · Accepted Answer

The standard deviation in a normal distribution measures the dispersion or variability around the mean, indicating how spread out the values are. Knowing the standard deviation allows one to estimate the probability of a value (in this case, the bus's arrival time) falling within a certain range around the mean (the scheduled arrival time).

On Average,Caryl's School Bus Arrives on Time,although Sometimes It Is