Mathematics, 21.05.2020 18:01, paigejohnson955

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%.

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A counselor claims that 20% of all students who take SAT score at least 1200, 25% score between 1000...