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.
1st Quartile. Range Minimum. Range Minimum: First Quartile (0 - 25th Percentile of Range): Salaries paid in this area typically apply to entry-level employees who are comparatively inexperienced and who are in the process of developing their skills, abilities, and knowledge in their field of endeavor.st Quartile. Range Minimum. Range Minimum: First Quartile (0 - 25th Percentile of Range): Salaries paid in this area typically apply to entry-level employees who are comparatively inexperienced and who are in the process of developing their skills, abilities, and knowledge in their field of endeavor.