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The amount of time to complete a physical activity in a PE class is approximately normally...

The amount of time to complete a physical activity in a PE class is approximately normally normally distributed with a mean of 39.7 seconds and a standard deviation of 6.2 seconds.

a) What is the probability that a randomly chosen student completes the activity in less than 33.2 seconds?

b) What is the probability that a randomly chosen student completes the activity in more than 46.6 seconds?

c) What proportion of students take between 35.5 and 42.8 seconds to complete the activity?

d) 75% of all students finish the activity in less than  s

Math   Statistics-And-Probability   
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SUMMARY: The amount of time to complete a physical activity in a PE class is approximately normally normally distributed with a mean of 39.7 seconds and a standard deviation of 6.2 seconds.

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