A Study Was Conducted to Investigate the Effect of an Intervention

question 55

Multiple Choice

A study was conducted to investigate the effect of an intervention protocol on IQ tests.Nine randomly selected students were tested. Set up the alternative hypothesis for the claim that the intervention protocol is effective in increasing scores.

• A)H₀: The probability distribution of test scores before and after the intervention protocol is identical.
• B)H₀: The probability distribution of test scores before the protocol has shifted to the left of the probability distribution of the test scores after the protocol.
• C)H₀: The probability distribution of test scores before the protocol has shifted to the right of the probability distribution of the test scores after the protocol.
• D)H₀: The probability distribution of test scores before the protocol has shifted to the left or right of the probability distribution of the test scores after the protocol.

---

Definitions:

Surplus

The situation in which the quantity of a good supplied exceeds the quantity demanded, often leading to lower prices.

Shortage

A market condition when the demand for a product exceeds its supply at a specific price.

Demand and Supply of Wheat

The relationship between the quantity of wheat that producers are willing to sell at various prices and the quantity that consumers are willing to buy.

Temporary Price

A price set for a product or service for a limited period before it returns to its normal level, often used in sales promotions.