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In an English class Emily earned an 86. In that class, the sample mean was 85...

In an English class Emily earned an 86. In that class, the sample mean was 85 with an estimated population standard deviation of 5. Her friend Amber in French class earned a 70. In that class, the sample mean was 65 with an estimated population standard deviation of 20. Should Emily be bragging about how much better she did? Why? An exam produced a sample mean of 80 with an estimated population standard deviation of 10. Answer the following questions based on this exam distribution: What is the z-score for a raw score of 80? What is the z-score for a raw score of 95? What is the z-score for a raw score of 60? What is the raw score for a z= -2.5? What is the raw score for a z= +1.25?

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TOPIC:Z-scores and interpretations.

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