Let the random variable X denote the number of children who do not recognize their mother's voice. Find the variance of X.
What will be an ideal response?
Question 2
A random sample of n observations, each of which could be classified into exactly one of k categories, is selected. Suppose that a null hypothesis specifies category probabilities that depend on the estimation of m unknown population parameters.
How many degrees of freedom does a goodness-of-fit-test have when population parameters are estimated?A) k - 1
B) m - 1
C) k - m - 1
D) k + m - 1
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