posted by diane on .
Find the five-number summary of the following set of numbers.
335, 233, 185, 392, 235, 518, 281, 208, 318
First, arrange the set of numbers in order, with the lowest first.
185, 208, 233, 235, 281, 318, 335, 392, 518
Then, follow the instructions in this website.
We'll be glad to check your answers.
Here is a definition of Five-number summary:
(1) the minimum (smallest observation)
(2) the lower quartile or first quartile (which cuts off the lowest 25% of the data)
(3) the median (middle value)
the upper quartile or third quartile (4) (which cuts off the highest 25% of the data)
(5) the maximum (largest observation)
In your case the median is 281 , the minimum is 185 and the maximum is 518. For the two quartiles, take the third and seventh largest numbers of the group.