Emily is a fifth-grade student who completed a standardized reading test. She scored one standard deviation above the mean score. How does the normal curve help you understand what this means about how your child compares to other children who took the test? Explain how you determined your findings. How many children scored lower than your child? How many scored higher?
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Emily has scored one standard deviation above mean score.
According to this, the normal curve' distribution says that if Emily score is 1 deviation above mean then there are 32% of students have scored more than her and 68% of people have scored less than her. The empirical rule states that 68%-95%--99.7% of the area is under the curve for 1, 2 and 3 standard deviations from the mean.
So, we have derived our finding from the general empirical rule of normal curve.
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