We use cookies to personalise content and advertisements and to analyse access to our website. Furthermore, our partners for online advertising receive pseudonymised information about your use of our website. cookie policy and privacy policy.
 
+0  
 
+1
40
1
avatar+361 

....

 Mar 27, 2019
 #1
avatar+99351 
+2

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

9 Online Users