Mathematics, 09.04.2020 06:19 jeniferfayzieva2018
According to the National Survey of Student Engagement, the average student spends about 17 hours each week preparing for classes; preparation for classes includes homework, reading and any other assignments. Assume the standard deviation of time spent preparing for classes is 4 hours. If you select a random sample of 16 students,
What is the probability that the mean time spent preparing for classes is at least 16 hours per week?
There is an 85% chance that the sample mean is less than how many hours per week?
If you select a random sample of 64 students, there is an 85% chance that the sample mean is less than how many hours per week?
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