A counselor claims that 20 of all students who take SAT scor

A counselor claims that 20% of all students who take SAT score at least 1200, 25% score between 1000 and 1190, and the remaining 55% score below 1000. A sample of 120 students showed that 20 students had the score of 1200, 35 had a score between 1000 and 1190, while the remaining 65 students scored below 1000. Test the counselor’s claim at 0.05 level of significance, using p-value of 50%.

A. Counselor’s claim is valid.

B. Counselor’s claim is not valid.

C. We cannot answer the question with the available information.

Solution

A. Counselor’s claim is valid.