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

question 15

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 7-7,80% of all the samples of 4 will have a sample mean of no more than how many hours from the population mean?

---

Definitions:

Payback Period

The duration needed to recoup the expenses of an investment.

Simple Rate of Return

A financial metric used to evaluate the efficiency of an investment or to compare the efficiencies of several investments, calculating net annual profit divided by initial investment cost.

Depreciates Assets

The process of allocating the cost of a tangible asset over its useful life, reflecting wear and tear, deterioration, or obsolescence.

Discount Rate

The interest rate used to discount future cash flows to present value, often used in investment and project valuation.