Which of the following statements is incorrect?

In a weak-form efficient market, it would not be possible to earn abnormally high returns by looking for patterns in security prices.

The real rate of interest is not observable because all industrial economies operate with some degree of inflation.

All the answers are correct except one.

The Fed manages a key component of the nation's economy by conducting fiscal policy, which affects how much of the individual and corporate taxes are collected.

Examples of real assets are plant and equipment.