Question

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Answer 1

The last statement "Graph B is a valid density curve because the curve is above the horizontal axis, and the area under the curve is 1." is the correct statement.

A few fundamental principles apply to density curves:

• A density curve's area beneath it represents probability.

• A density curve's area under it equals one.

• Base x height in a uniform density curve equals one.

• The likelihood that x = a will never occur.

• The likelihood that x < a is the same as that of x ≤ a.

Following the rules above, we can see from graph B that the curve is above the horizontal axis. That shows that the probabilities are positive which is a necessity. Moreover, the area under the curve must also be 1. That is also satisfied.

Hence, the last statement "Graph B is a valid density curve because the curve is above the horizontal axis, and the area under the curve is 1." is the correct statement.

Learn more about density curves here-

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Answer 2

Answer: Graph B is a valid density curve because the curve is above the horizontal axis, and the area under the curve is 1.