AIR MATH

Math Question

1. 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 \( z=\frac{x-\mu}{\sigma} \) where \( x \) is the given value, \( \mu \) is the mean and \( \sigma \) is the standard deviation. Then refer to the chart on page 11 of the lesson to find the probability. \( .6915 \) \( .9918 \) \( .9332 \) \( .8643 \)

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