A researcher examined the admissions to a mental health clinic’s emergency room on days when the moon was full. For the twelve days with full moons from August 1971 through July 1972, the numbers of people admitted were: 5, 13, 14, 12, 6, 9, 13, 16, 25, 12, 14, 20. Calculate the two- sided P-value test for the null hypothesis that these data are a random sample from a normal distribution with a population mean equal to 11.2, the average number of admissions on other days. Solution.