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In a normally set of scores from a class of 25 students, how many z-scores are greater than -1 

 Mar 11, 2021
 #1
avatar+30791 
+1

z-score   of -1    is   one standard eviation from the mean and = .1841     or     18.41 %

                                       18.41 are below    and 100-18.41 =81.59 % of the scors are higher

 Mar 11, 2021
 #2
avatar+30791 
+1

   **** add- on ****

                                         81.59% * 25 students ~~~ 20 scores higher than   z - score = -1

ElectricPavlov  Mar 11, 2021

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