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.
The range of data values for which you want to calculate the specified quartile. quart. An integer between 0 and 4, representing the required quartile. If the requested quartile falls between two of the values in the supplied array, Excel interpolates between these values to calculate the quartile value. The 4th quartile is the same as the 100th percentile (and is equal to the maximum value in the range).