Ans:
z scores for Anna:
z1=(84-68)/16=1
z2=(84-85)/4=-0.25
Total of z scores=1-0.25=0.75
z scores for Megan:
z1=(90-68)/16=1.375
z2=(78-85)/4=-1.75
Total of z scores=1.375-1.75=-0.375
The total of Anna's z scores is 0.8,which is greater than Megan's total of -0.4
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