I got two problems that are statistics.
Find a value of the standard normal random variable z, called Z0 such that P(-Z0 ≤ Z ≤ Z0) = 0.98
The time for the event for boys in secondary school is known to possess a normal distribution with a mean of 470 seconds and a standard deviation of 60 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?
If someone could please help that would be greatly appreciated.