statistics

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Which of the following statements are correct?

a. A normal distribution is any distribution that is not unusual.

b. The graph of a normal distribution is bell-shaped.

c. If a population has normal ditribution, the mean and the median are not equal.

d. The graph of a normal distribution is symmetric.

  • statistics -

    b and d are correct

  • statistics -

    Which of the following are correct statements regarding the goodness-of-fit test?
    A) Data may be of nominal scale.
    B) Population must be normal.
    C) All the expected frequencies must be equal.
    D) The expected frequencies must be equal.

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