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Z= x-m/standard deviation
46-45/2
z= 1/2 or 0.5
Lesley got a score of 68 in examination she participated. What is corresponding z value of her score if the result has a mean of 75 and a SD of 5.
The mean grade of leonora in the final examination in math is 85 and the SD is 7. In science her mean grade was 89 and the SD was 13. She scored 90 in math and 94 and science. In which subject was her standing higher?
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