Tin has long been used in alloys with lead as solder, in amounts 5 to 70% w/w. Tin with lead forms a eutectic mixture at the weight proportion of 61.9% tin and 38.1% lead (the atomic proportion: 73.9%
The first quartile (Q 1) is defined as the middle number between the smallest number and the median of the data set.
What is a Quartile. Quartiles are the values used to divide a set of numbers into four equal groups. Put the numbers in order and divide them in half using a median.To the left of the median, the numbers are separated again, and to the right of the median, make a third separation.hat is a Quartile. Quartiles are the values used to divide a set of numbers into four equal groups. Put the numbers in order and divide them in half using a median.