Using [he test data from problem 1.1, compute the KR - 20 (or Cronbacb's Alpha) for the test. Also, compute a point-bacterial correlation coefficient for each item. Remember that a point-bacterial...

Using [he test data from problem 1.1, compute the KR - 20 (or Cronbacb's Alpha) for the test. Also, compute a point-bacterial correlation coefficient for each item. Remember that a point-bacterial correlation is equivalent to a Pearson correlation coefficient when one of the scores has values of 0 or 1.

Given the following answer key:

Write a SAS program to grade the six students whose data are shown here. Provide one listing in Social Security number order and another in decreasing test-score order. Compute both a raw score (the number of items correct) and a percentage score.

Student Data: