To do the following I first listed the numbers from least to greatest
<em>mean</em>: (also known as average) is 7 just add all the numbers together and divide by the amount of numbers there are which is 77/11
<em>median</em>: 5 it's the middle number (5, <u>5</u>, 6)
<em>mode</em>: 2 the number that appears the most
<em>range</em>: 16 difference between the highest value and the lowest (18-2)
<em>quartile</em> <em>1</em>: 2 median of the lower half
<em>quartile</em> <em>3</em>: 9 median of the upper half
<em>interquartile</em> <em>range</em>: 7 (Q3-Q1)
hope this helped :)