TABLE 7-7 Times Spent Studying by Students in the Week Before Final

question 9

Short Answer

TABLE 7-7
Times spent studying by students in the week before final exams follow a normal distribution with standard deviation 8 hours.A random sample of 4 students was taken from a population of 50 in order to estimate the mean study time for the population of all students.Use the finite population correction.
-Referring to Table 7-7,what is the probability that the sample mean differs from the population mean by more than 3 hours?

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Definitions:

Nonpoint Sources

Pollution sources that are diffuse and do not have a single point of origin, such as runoff from agricultural land.

Sahara Desert

The largest hot desert in the world, located in North Africa, known for its vast expanses of sand dunes, gravel plains, and rocky plateaus.

Desertification

The process by which fertile land becomes desert, typically as a result of drought, deforestation, or inappropriate agriculture.

Sahel Region

A semi-arid region of Africa that stretches from the Atlantic Ocean to the Red Sea, lying between the Sahara Desert to the north and the Sudanian Savanna to the south.