a normal distribution has a nean of 54 and stardard deviation of 6,what is the probability

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Question description

1. Participants in a random sample of 100 college students are asked to state the number of hours they spend studying during finals week. Among all college students at this school (the population), the mean study time is 20 hours during finals week with a standard deviation of 15 hours.

1. Determine the sample mean.

2. Determine the standard error of the sample.

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