Posted by **carmen** on Monday, April 23, 2007 at 1:55am.

Please help me to find the five-number summary of the following set of numbers.338, 226, 149, 391, 247, 501, 300, 223, 320

According to a definition I found online,

"The five-number summary of the data consists of the minimum data point, the first quartile, the median, the third quartile, and the maximum data point. Thus these five numbers display the full range of variation (from minimum to maximum), the common range of variation (from first to third quartile), and a typical value (the median). "

Arrange the nine numbers in ascending order. Then take the first, third, fidth, seventh and ninth number. That should be the answer. The numbers dividing the set into four quartiles.