Field Trip Rock Count
7
8
9
10
11
12
13
14
number of rocks
What range of numbers of rocks were collected by 50% of the students? Select all that apply.
6 and 10
6 and 13
9 and 13
9 and 14
11 and 14

Okay, so here we have to find the middle of the data set and the quartiles.

The median or middle is 10.5 (There are an even number of numbers in this data set so we have to find the middle of the middle two numbers.)

Q1 would be 8.5 and Q3 would be 12.5.

Now we have to find intervals that are either completely below the median or completely above, and ones between the quartiles. Also, ones between the quartiles and the lowest/highest values.

The answers would be:

6 and 10

11 and 14

I hope this helps!

11

step-by-step explanation:

32.50-7.50=25

225/25=11