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Mr. Emmer gave a test in his Chemistry class. The scores were normally distributed with a mean of 82 and a standard deviation of 4. A student is randomly chosen. What is the probability that the student scores an 88 or below? Use the formula for a z-score z equals fraction numerator x minus mu over denominator sigma end fraction where x is the given value, μ is the mean and σ is the standard deviation. Then refer to the chart on page 11 of the lesson to find the probability.
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