Question

The scores listed below are the results from students taking a dexterity test. What is the 75th percentile of these scores?



1, 1, 1, 1.5, 2, 2, 2, 2.5, 3



2
2.25
2.5

Answer 1

@texaschic101 Will u help me

Answer 2

Will u please tell me how u got that answer

Answer 3

of course.....do you know how to find quartiles ?

Answer 4

Idk

Answer 5

Lets start again.....do you know how to find the median (middle number ) of this set of data ?

Answer 6

Oh ya

Answer 7

what is it ?

Answer 8

10

Answer 9

no....the middle number...there is no 10 in your data.
How many numbers are there ?

Answer 10

nvm its 2

Answer 11

yes...that is the middle number also called quartile 2 or the 50th percentile.
Now look at the numbers before the median....1,1,1,1.5....take the median of this....since there is two medians we need to average....(1 + 1)/2 = 2/2 = 1. That 1 is the 25th percentile or quartile 1. You need to do the same for the numbers after the median....2,2,2.5,3....can you find the middle term in these numbers ? Because that will be quartile 3, also known as the 75th percentile.
I was wrong about the answer....I was counting the numbers wrong...I didn't see the decimals. 2 is not the answer

Answer 12

do you understand ?

Answer 13

take the numbers after the median...2,2,2.5,3.....find the middle number. Since there is two middle numbers, we average them...(2 + 2.5)/2 = 4.5/2 = 2.25.
2.25 is your 75th percentile or quartile 3.

Answer 14

So is it 2.25 or 2