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PLEASE NEED HELP

2 graphs. Graph A: a dotted line goes from (1, 0) to (1, 0.25), is solid and horizontal to (2, 0.25), is dotted to (2, negative 0.1875), is solid and horizontal to (6, negative 0.1875), and then is dotted to (6, 0). Graph B. A line goes from (negative 5, 0) to (negative 3, 0.25), and then decreases to (3, 0).




Which statement about the graphs is true?


Graph A is a valid density curve because the part of the graph from 2 to 6 is below the horizontal axis.

Graph A is not a valid density curve because the part of the graph from 1 to 2 is above the horizontal axis.

Graph B is not a valid density curve because part of the horizontal axis has negative values.

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


Pictures posted below

PLEASE NEED HELP2 Graphs Graph A A Dotted Line Goes From 1 0 To 1 025 Is Solid And Horizontal To 2 025 Is Dotted To 2 Negative 01875 Is Solid And Horizontal To class=
PLEASE NEED HELP2 Graphs Graph A A Dotted Line Goes From 1 0 To 1 025 Is Solid And Horizontal To 2 025 Is Dotted To 2 Negative 01875 Is Solid And Horizontal To class=

Sagot :

Medunno13idn

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

Varshamittal029idn

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-

brainly.com/question/18345488

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