Standard deviation of 12. assume that scores in both, Ask an Expert

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Maria and Zoe are taking Biology 105, but are in different classes. Maria's class has an average of 78% with a standard deviation of 5% on the midterm while Zoe's class has an average of 83% with a standard deviation of 12%.Assume that scores in both classes follow a normal distribution. Convert Maria's midterm score of 84 to a standard z score.

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