Which of the following statements is true for chi-squared tests?

Which of the following statements is true for chi-squared tests?
 a. Testing for equal proportions is identical to testing for goodness-of-fit.
  b. The number of degrees of freedom in a test of a contingency table with r rows and c columns is (r - 1)(c - 1).
  c. The number of degrees of freedom in a goodness-of-fit test with k categories is k - 1.
  d. All of these choices are true.

Q. 2

Formulas for confidence intervals and test statistics all come from ____________________ distributions.
 Fill in the blank(s) with correct word

Q. 3

Which of the following tests does not use the chi-squared distribution?
 a. Test of a contingency table.
  b. Goodness-of-fit test.
  c. One tailed test for two proportions.
  d. None of these choices.

Q. 4

In any hypothesis test there are two possible errors, called ____________________ and ____________________.
 Fill in the blank(s) with correct word

Q. 5

The chi-squared distribution is used in:
 a. a goodness-of-fit test.
  b. a test of a contingency table.
  c. describing a population having more than two categories.
  d. All of these choices are true.

Q. 6

The standard that we use to decide whether or not to reject a null hypothesis is the probability of a(n) ____________________.
 Fill in the blank(s) with correct word