Let the random variable X denote the number of children who do ...

[dakota nelson]

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

[mk6555]

Answer to Question 1

2 = nP(1 - P) = 1.8

Answer to Question 2

C

[dakota nelson]

Correct answers!

[mk6555]

Great! Please up vote