Answer:
median = 11.5 . first quartile = 9.5 , third quartile = 14.5
Step-by-step explanation:
<h2><u>arrange the 12 numbers in order:</u></h2>
9,9,9,10,11,11,12,13,14,15,16,17
<h2><u>
median </u></h2>
since there is an even number (12)
we can divide by 2
12 /2
= 6th position and 7th position
= 11 + 12
= 23 / 2 = 11.5
<h3>median is 11.5</h3>
<h2><u>first quartile</u></h2>
is also known as the lower quartile is half of the median position
6/2 = 3rd position and 7/2 = 3.5th position
9 + 10 = 19
19 / 2 = 9.5
<h3>first quartile is 9.5</h3>
<h2><u>third quartile </u></h2>
also known as upper quartile
is the position of median + position of lower quartile
= 6 +3 = 9th position and 7 +3 = 10th position
= 14 + 15 = 29
29/2 = 14.5
<h3>third quartile is 14.5</h3>
