TABLE 9-1 A Manufacturer Produces Light Bulbs That Have a Mean Life

question 132

Short Answer

TABLE 9-1
A manufacturer produces light bulbs that have a mean life of at least 500 hours when the production process is working properly. Based on past experience, the population standard deviation is 50 hours and the light bulb life is normally distributed. The operations manager stops the production process if there is evidence that the population mean light bulb life is below 500 hours.
-Referring to Table 9-1, if you select a sample of 100 light bulbs and are willing to have a level of significance of 0.05, the probability of the operations manager failing to stop the process when the process is not working properly is ________ if the population mean bulb life is 490 hours.

---

Definitions:

Interest Accrued

The accumulated interest on a loan or bond that has not yet been paid to the lender.

Proceeds of a Note

The total amount of money generated or to be paid out from a promissory note or financial instrument.

Reversing Entry

An accounting entry that is made at the beginning of an accounting period to reverse or cancel out a journal entry made at the end of the previous accounting period.

Interest Accrued

Interest that has been incurred but not yet paid, representing a liability on the balance sheet until it is paid.