A Random Sample of 87 Airline Pilots Had an Average

question 18

Short Answer

A random sample of 87 airline pilots had an average yearly income of $99,400 with a standard deviation of $12,000.
a.If we want to determine a 95% confidence interval for the average yearly income, what is the value of t?
b.Develop a 95% confidence interval for the average yearly income of all pilots.

---

Definitions:

Cash

Money in the form of coins or banknotes, especially that issued by a government.

Accruals

Accounting adjustments for revenues that have been earned but not yet recorded, and expenses that have been incurred but not yet recorded.

Explicit Interest

The interest rate stated in a contract or agreement, not including any compounding interest or hidden fees.

Capital

Financial assets or the value of financial assets used for the creation of goods or services or for investing.