Mathematics, 26.09.2019 18:30 morgan15776
The times of the runners in a marathon are normally distributed, with a mean of 3 hours and 50 minutes and a standard deviation of 30 minutes. what is the probability that a randomly selected runner has a time less than or equal to 3 hours and 20 minutes? use the portion of the standard normal table below to answer the question.
z probability
0.00 0.5000
0.50 0.6915
1.00 0.8413
2.00 0.9772
3.00 0.9987
a. 16%
b. 32%
c. 34%
d. 84%
Answers: 2
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The times of the runners in a marathon are normally distributed, with a mean of 3 hours and 50 minut...
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