Question

Assume that a study of 300 randomly selected school bus routes showed that 274 arrived on time. is it unusual for a school bus to arrive late?

Answer 1

To determine whether it is unusual for a school bus to arrive late, we need to calculate the probability of a school bus arriving late. Since we know that 274 out of 300 school bus routes arrived on time, the probability of a school bus arriving on time is:

P(arriving on time) = 274/300 = 0.9133

The probability of a school bus arriving late is therefore:

P(arriving late) = 1 - P(arriving on time) = 1 - 0.9133 = 0.0867

So, it is not necessarily unusual for a school bus to arrive late, as there is about an 8.67% chance of this occurring. However, whether or not this is unusual would depend on the specific context and expectations of the school district and community in question.