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A physical fitness association is including the mile run in its secondary-school fitness test. The time for this event for boys in secondary school is known to possess a normal distribution with a mean of 460 seconds and a standard deviation of 40 seconds. The fitness association wants to recognize the fastest 10% of the boys with certificates of recognition. What time would the boys need to beat in order to earn a certificate of recognition from the fitness association.

Choices:
a) 408.8
b) 511.2
c) 394.2
d) 525.8

I got b. Is that correct?

  • Statistics - ,

    Right!

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