The first quartile of a data set is 2.5. which statement about the data values is true? one fourth of the values are less than or equal to 2.5, and three fourths of the values are above 2.5. half of the values are less than or equal to 2.5, and half of the values are more than 2.5. three fourths of the values are less than or equal to 2.5, and one fourth of the values are above 2.5. one fourth of the values are less than or equal to 2.5, and half of the values are above 2.5.