Application exercises

1. Look back at the data set in Table 5.5. Calculate the following:
a. K-R20
b. K-R21
c. Threshold-loss coefficient for a 70% passing score

2. Look back at Table 5.4. Calculate the following for the test at Time 2:
a. KR-20
b. KR-21
c. The threshold-loss coefficient for a single administration
d. The correlation coefficient between the two administrations

3. Find a language program you are familiar with. How does it address issues of consistency.

4. List the issues surrounding test content if a strong form of the unidimensionality assumption is adopted (one beyond just the statistical notion).