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let x be the time between two successive trains passing through the crossing. what isthe third quartile of the distribution of x?

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Final answer:

The third quartile of the distribution of x represents the value below which 75% of the time between two successive trains passing through the crossing falls.

Step-by-step explanation:

The third quartile of the distribution of x represents the value below which 75% of the time between two successive trains passing through the crossing falls. In other words, it gives us a measure of the time within which most of the train intervals fall.

To find the third quartile, you would need a dataset of train intervals. Then, you would arrange the intervals in increasing order and find the value at which 75% of the data falls below. This value will be the third quartile.

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