The Lengths of Steel Rods Produced by a Shearing Process

question 4

Multiple Choice

The lengths of steel rods produced by a shearing process are normally distributed.A random sample of 10 rods is selected; the sample mean length is 119.05 centimetres; and the sample standard deviation is 0.10 centimetres.The 95% confidence interval for the population mean rod length is ___.

• A)118.99 to 119.11
• B)118.82 to 119.28
• C)118.98 to 119.12
• D)118.85 to 119.25
• E)119.89 to 122.12

---

Definitions:

Gross Profit

The financial gain made after subtracting the cost of goods sold from the total sales revenue.

Net Sales

Net sales is the revenue from sales of goods or services after subtracting returns, allowances for damaged or missing goods, and discounts.

Inventory Available

The total quantity of goods a company has on hand for sale at any given time, including both finished goods and goods in production.

Current Asset

Assets that are expected to be converted into cash, sold, or consumed within one year or within the company’s normal operating cycle if longer.