SCENARIO 7-1 The Time Spent Studying by Students in the Week Before

question 49

Short Answer

SCENARIO 7-1
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 to estimate the mean study time for the population of all students.
-Referring to Scenario 7-1,what is the probability that the sample mean is more than 3 hours below the population mean?

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Definitions:

Critical Value

A point on the scale of the test statistic beyond which we reject the null hypothesis; it's determined by the significance level.

Null Hypothesis

A statement suggesting that there is no significant difference or relationship between specified populations, any observed difference being due to sampling or experimental error.

Null Hypothesis

A statement in statistical hypothesis testing that assumes no effect or no difference between phenomena or populations.

Level of Risk

The probability or chance of experiencing harm or loss.