When the internal consistency of a test is being determined on ...

[Sufayan.ah]

When the internal consistency of a test is being determined on the basis of
  the Kuder-Richardson formula (KR21), then it should NOT be followed by
 
  a. any attempts to determine predictive validity
  b. any attempts to determine concurrent validity
  c. the Spearman-Brown prophecy formula
  d. none of these, since the KR21 is NOT an internal consistency measure

Question 2

In a two-way 2, N can be found by
 
  a. adding all observed frequencies.
  b. adding row total observed frequencies.
  c. adding column total observed frequencies.
  d. All of the above are correct.

[sarahccccc]

Answer to Question 1

c

Answer to Question 2

d