StatTutor Lesson - Describing Density Curves

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      Applet

      36

      Questions 1-2

      53

      Question 1.

      Which measure of center represents the balance point of the density curve?

      A.
      B.

      Incorrect. Graphically, the mean is equivalent to the balance point.
      Correct. Graphically, the mean is equivalent to the balance point.
      Incorrect. Try again.
      2

      Questions 3-5

      212

      Question 3.

      If the density curve is symmetric, then the mean is ____________ the median.

      A.
      B.
      C.

      Incorrect. The mean equals the median when the density curve is symmetric.
      Correct. The mean equals the median when the density curve is symmetric.
      Incorrect. Try again.
      2

      Questions 6-10

      276

      Question 6.

      True or false: The symbol for the mean of a population, and for the mean of a sample, are the same.

      A.
      B.

      Incorrect. The symbol for mean of a population differs from the notation for mean of a sample. Similarly, the symbol for standard deviation of a population differs from the notation for standard deviation of a sample.
      Correct. The symbol for mean of a population differs from the notation for mean of a sample. Similarly, the symbol for standard deviation of a population differs from the notation for standard deviation of a sample.
      Incorrect. Try again.
      2