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The 100-meter race times at a state track meet are normally distributed with a mean of...

The 100-meter race times at a state track meet are normally distributed with a mean of 14.62 seconds and a standard deviation of 2.13 seconds. Using the Standard Normal Probabilities table, what is the approximate probability that a runner chosen at random will have a 100-meter time less than 15.5 seconds?

1. 0.1894

2. 0.3409

3. 0.6591

4. 0.7910

math   Statistics-And-Probability   
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