+0  
 
+1
218
1
avatar+516 

....

 Mar 27, 2019
 #1
avatar+111400 
0

1.

 

[ Sarah's point total -  17 ]

____________________     =    2.8       multiply  both sides by 4

           4

 

 

Sarah's point total  -   17 =     11.2        add 17 to both sides

 

Sarah's point total   =    28.2

 

 

2.  A z-score of  2.8 means that she scored more points than about  99.74%  of  the participants.....this would be  considered very unusual

 

 

cool cool cool

 Mar 27, 2019

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