8. An education professor has 15 college seniors who are doing their student teaching. 8.

They also recently took a teacher certification test required by the state. The professor obtains a correlation of .40 between these test scores and ratings of student-teaching performance that were provided by the field supervisor at the end of the semester.

(a) Use a significance testing approach (Table E) to evaluate the sample result (α= 05).

(b) Use an interval estimation approach to evaluate the sample results (95% level of confidence).

(c) What particular weakness of the personnel director’s study is illustrated by your answer to Problem 8b?