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0 1 pt 100 Details The amount of time to complete a physical activity in...

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0 1 pt 100 Details The amount of time to complete a physical activity in a PE class is approximately normally distributed with a mean of 39 8 seconds and a standard deviation of 6 4 seconds a What is the probability that a randomly chosen student completes the activity in less than 31 7 seconds b What is the probability that a randomly chosen student completes the activity in more than 45 6 seconds c What proportion of students take between 35 6 and 44 4 seconds to complete the activity d 95 of all students finish the activity in less than seconds

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