TABLE 7-1 Times Spent Studying by Students in the Week Before Final

question 147

Short Answer

TABLE 7-1
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 7-1, 90% of all the samples of 4 will have a sample mean of no more than how many hours from the population mean?

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Definitions:

Population

In statistics, population refers to the entire group of individuals or items that a study intends to investigate or draw conclusions from.

Rate

A ratio that measures how one quantity changes in relation to another.

Sum

The outcome of summing two or more numbers.

Infinite Series

A sum of infinitely many terms following a specific pattern.