Practice and Application Flashcards

A researcher collects data on 200 students' test scores and finds the mean is 75 with a standard deviation of 10. Which score is exactly two standard deviations above the mean?

Answer: 95

Two standard deviations above the mean = 75 + (2 × 10) = 95.

A store offers a 30% discount on an item originally priced at $240. What is the sale price?

Answer: $168

30% of $240 is $72, so the sale price is $240 − $72 = $168.

Which of the following best demonstrates the application of cause-and-effect reasoning?

Answer: Explaining how increased CO₂ emissions raise global temperatures

Cause-and-effect reasoning links an action (CO₂ emissions) to a resulting consequence (temperature rise).

A train travels 360 miles in 4.5 hours. What is its average speed in miles per hour?

Answer: 80 mph

Average speed = distance ÷ time = 360 ÷ 4.5 = 80 mph.

When applying a learned concept to a new, unfamiliar situation, which cognitive skill is primarily being used?

Answer: Transfer

Transfer is the ability to apply knowledge or skills learned in one context to a new situation.

A cylindrical tank has a radius of 3 feet and a height of 8 feet. What is its volume? (Use π ≈ 3.14)

Answer: 226.08 cu ft

Volume = π × r² × h = 3.14 × 9 × 8 = 226.08 cubic feet.

A student reads that plants need sunlight to make food. She then places a plant in a dark closet for two weeks and observes it wilting. This experiment best illustrates:

Answer: Hypothesis confirmation through observation

The student applied a known principle and confirmed her hypothesis by observing the expected outcome.