Mathematics, 10.05.2021 06:30 powellmj9216
The amount of time to complete a physical activity in a PE class is approximately normally normally
distributed with a mean of 37.1 seconds and a standard deviation of 7.9 seconds.
a) What is the probability that a randomly chosen student completes the activity in less than 31.1 seconds?
b) What is the probability that a randomly chosen student completes the activity in more than 41.2 seconds?
c) What proportion of students take between 30.8 and 41.8 seconds to complete the activity?
d) 70% of all students finish the activity in less than
seconds.
Answers: 2
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