## bethjewell1996 Group Title 13. Find the values of the 30th and 90th percentiles of the data. 18, 9, 7, 5, 11, 7, 17, 20, 19, 2, 17, 12, 5, 1, 13, 12, 11, 15, 16, 20 (1 point) • 30th percentile = 7 90th percentile = 19 • 30th percentile = 9 90th percentile = 19 • 30th percentile = 11 90th percentile = 19 • 30th percentile = 7 90th percentile = 20 one year ago one year ago

1. bethjewell1996 Group Title

can anyone help?!?!?1

2. bethjewell1996 Group Title

@AravindG

3. AravindG Group Title

Do you knw what percentile is ?

4. bethjewell1996 Group Title

yeah the %

5. bethjewell1996 Group Title

Each of the 100 equal groups into which a population can be divided according to the distribution of values of a particular variable.

6. AravindG Group Title

No I thin % and percentile are different terms

7. AravindG Group Title

*think

8. AravindG Group Title

To find percentile you need to first arrange the given data in ascending order

9. bethjewell1996 Group Title

Okay and from there

10. AravindG Group Title

Whats the n value you get ?

11. bethjewell1996 Group Title

1 2 5 7 9 11 12 13 15 16 17 18 20

12. AravindG Group Title

if you have a data set with n samples this is how you find the pth percentile. order the data set in ascending order use this equation to find the index of the percentile p/100 * (n + 1) if the soluition is an integer, say 32, then the pth percentile value is the 32nd data point from the sample in ascending order. if the solution is not an integer then you find the average value be the two surrounding points. for example, say the solution is 23.7 for the index of the pth percentile. the value reported is the average of the 23rd and 24th data point. This can be either the simple average or a weighted average. ^^I got that from yahoo answers .Its explained nicely

13. bethjewell1996 Group Title

Okay so if i did this right I got 7 and 20

14. AravindG Group Title