+0  
 
0
200
25
avatar+3027 

Help 4,5

NotSoSmart  Apr 17, 2018
 #1
avatar+88897 
+1

Here's 4

 

24  18  29  21 16  23 13  11

 

First step...order the data  from lowest to highest

11 13 16  18     21  23  24  29

 

Find the median of the data  =  (18 + 21)/2     =  39/2  =  19.5    = Q2

 

Find Q1 =    (13+16) / 2 = 29/2  =  14.5

 

Find Q3  =   (23 + 24)/2 = 47/2 = 23.5

 

The first answer is correct

 

cool cool cool

CPhill  Apr 17, 2018
 #2
avatar+88897 
+1

5.  This is pretty easy, NSS........

 

18  9   7   5   11   7  17  20  19   2   17   12   5   1   13   12    11   15   16   20

 

Order data from low-to-high...there are 20 values

 

1  2   5  5  7   7   9    11  11   12  12   13  15   16   17    17    18    19     20   20

 

To find the 30th percentile....multiply  .30 * 20    =  6    (this is the index)

The 6th number in the data set  is   7

  

 

Similary...to find the 90th percentile......multiply  .90 * 20   =  18    (this is the index )

The 18th number in the data set is 19

 

 

So.....the first answer is correct     

 

(BTW....there may be several  other acceptable  ways to do this )

 

 

cool cool cool

CPhill  Apr 17, 2018
edited by CPhill  Apr 17, 2018
 #9
avatar+1357 
+3

Debatable

IAmJeff  Apr 20, 2018

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