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TABLE 7-2 The Time Spent Studying by Students in the Week Before

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TABLE 7-2
The time spent studying by students in the week before final exams follows a normal distribution with a standard deviation of 8 hours. A random sample of 4 students was taken in order to estimate the mean study time for the population of all students.
-Referring to Table 7-2, what is the probability that the sample mean is more than 3 hours below the population mean?


Definitions:

Composed

Being calm and in a state of self-control; or, alternatively, having been created or put together in a thoughtful manner.

Several Sittings

Referring to completing a task or exam in multiple separate sessions rather than in a single continuous period.

Revise

To review and make changes or corrections to a document or plan to improve its accuracy, effectiveness, or condition.

Connotation

The implied or emotional significance attached to a word or phrase, beyond its literal meaning.

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