AP Statistics

posted by .

Hi, we just started density curves in AP Stats, and I am a little confused about one of the concepts.

It keeps saying that a density curve has to have an area equal to 1 below it...

1 of what?

I don't understand how you figure out if the area of your curve is 1, or what unit this "1" is in...

Sorry, and thanks!

  • AP Statistics -

    If you understand that density curves are eventually used for calculating probabilities of certain events, they have to be normalized some how. Since the total area under the density represent the probability of all possible events, it would be convenient to normalize the area to unity.

  • AP Statistics -

    A density curve is just another way of saying a pie chart. Its 100%, a whole. which is alonther word for saying its equal to 1. your different measurements with be equal to different percentages that you will mark in the density curv. All of them comprised will equal t. so for example..a measurement will be 60% of people. you will shade .60 and be left with .40. Together they will equal 1.

    make sense?

  • AP Statistics -

    Yes, I think so. Thanks :)

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Ecology

    What are the types of population density measure and how each may be determined?
  2. chemisrty

    can anybody give me the density of arsenic oxide at STP is this the correct formula volume = mass/ density thanks Yes, but if you want the density, it is density = mass/volume. The number I have seen floating around on this board is …
  3. Physics

    By how much does the H20 pressure exceed atmospheric pressure at 3 meters below the surface of a pool with fresh H20. I don't know what equation to use. You have to figure the weight of a column of water of some height h, and horizontal …
  4. AP Statistics

    A certain density curve looks like an interverted letter V. The first segment goes fro the point (0,0.6) to the point (0.5,1.4). The segment goes from ( to (1,0.6). (a) Sketch the curve. Verify that the area under the curve …
  5. Physics

    A medical technician is trying to determine what percentage of a patient's artery is blocked by plaque. To do this, she measures the blood pressure just before the region of blockage and finds that it is 1.20×10^4 Pa, while in the …
  6. Chemistry II

    what is the molar mass of a gaseous organic compound with a density of 3.38 g/L at 40oC and a pressure of 1.97 atm?
  7. Stat

    Remeber that it is areas under a density curve, not the height of the curve, that give proportions in a distribuiton. To illustrate this, sketch a density curve that has its peak at 0 on the horizontal axis but ahs greater area within …

    The area under a normal curve distribution is I have an answer of equal to one. is this correct?
  9. Statistics

    Accidents on a bike path. Examining the location of accidents on a level, 5-mile bike path shows that they occur uniformly along the length of the path. Figure 3.4 displays the density curve that describes the distribution of accidents. …
  10. Stats

    Let the random variable X be a random number with the uniform density curve given below. P(0.6 < X < 0.9) is

More Similar Questions