The National Academy of Science reported in a 1997 study that 43% of research in mathematics is published by US authors. The mathematics chairperson of a prestigious university wishes to test the...

The National Academy of Science reported in a 1997 study that 43% of research in mathematics is published by US authors. The mathematics chairperson of a prestigious university wishes to test the claim that this percentage is more than 43%. He surveys a simple random sample of 150 recent articles published by reputable mathematics research journals and finds that 70 of these articles have US authors. Does this evidence support the mathematics chairperson’s claim that the percentage is more than 40%? Use a 0.05 level of significance.