The Mean Lifetime of a Fluorescent Light Bulb Is 1,570

question 58

Short Answer

The mean lifetime of a fluorescent light bulb is 1,570 hours with a standard deviation of 200 hours. Suppose we take a sample of 100 bulbs, test them, and calculate the sample mean.
Find the mean of the sampling distribution.
______________
Find the standard deviation.
______________
What is the probability the sample mean exceeds 1,560 hours?
______________

---

Definitions:

Accounts Receivable

Unsettled dues from customers to a business for goods or services that have already been delivered or used.

Fees Earned

Revenue generated from providing services to clients or customers.

Unadjusted Trial Balance

A list of all ledger accounts and their balances at a certain time before any adjustments are made for year-end closing.

Corrected Trial Balance

A trial balance prepared after all adjustments, errors, and corrections have been made, serving as the basis for financial statement preparation.