lower quartile and upper quartile normal distribution
1 The Upper Quartile Q3 is that number such that 75% of observations are less than it and 25% are larger, or to be more precise, at least 75% of the sorted values are less than or equal to Q 3, and at least 25% of the values are greater than or equal to Q 3.ote that the numbers 1, 2 are less than or equal to the lower quartile, while 2, 3, 4, 5, 6, 7 are larger than or equal to Q 1. Therefore, 2 out of 7 or 28% of values are less than or equal to Q 1 and 6 out of 7 = 85% are larger than Q 1.
1 The Lower Quartile Q1 is that number such that 25% of observations are less than it and 75% are larger, or to be more precise, at least 25% of the sorted values are less than or equal to Q 1 and at least 75% of the values are greater than or equal to Q 1.ote that the numbers 1, 2 are less than or equal to the lower quartile, while 2, 3, 4, 5, 6, 7 are larger than or equal to Q 1. Therefore, 2 out of 7 or 28% of values are less than or equal to Q 1 and 6 out of 7 = 85% are larger than Q 1.