The data in table 7-7 are collected in an experiment designed to investigate the impact of different positions of the mother during the ultrasound on fetal heart rate, fetal heart rate is measured by ultrasound in beats per minutes. The study includes 20 women who are each assigned to one position and have the fetal heart rate measured in that position. Each woman is between 28 weeks and 32 weeks gestation. Is there a signicant difference in mean fetal heart rates by position? Run the test a 5% level of signicant