To Find the Standard Deviation of the Diameter of Wooden $s = 0.16$

question 18

Multiple Choice

To find the standard deviation of the diameter of wooden dowels, the manufacturer measures 19 randomly selected dowels and finds the standard deviation of the sample to be $s = 0.16$ . Find the $95 \%$ confidence interval for the population standard deviation $\sigma$ .

• A) \(0.12 < \sigma < 0.24\)
• B) \(0.15 < \sigma < 0.21\)
• C) \(0.11 < \sigma < 0.25\)
• D) \(0.13 < \sigma < 0.22\)

---

Definitions:

Credit Memo

A Credit Memo is a document issued by a seller to a buyer, reducing the amount the buyer owes to the seller under specific circumstances, such as returned goods.

Gross Profit

Gross profit is a company's revenue minus its cost of goods sold, representing the profit made before deducting overheads, payroll, taxation, and interest payments.

Discount Period

The discount period is the timeframe during which a payment can be made at a reduced price or interest rate before returning to its original rate.

Perpetual Inventory System

An approach to inventory management where updates are made continuously as inventory items are bought and sold.