Mathematics, 11.07.2019 14:00 faithtunison

The test grades of a science class are given. 78, 75, 70, 92, 69, 83, 98, 76, 75, 82, 91, 89. the grades are normally distributed with a mean of 81.5 and a standard deviation of 9.3. what is the z-score of the highest grade in the test? round the answer to the nearest hundredth. a. -1.77 b. -0.81 c. 0.81 d. 1.77

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The test grades of a science class are given. 78, 75, 70, 92, 69, 83, 98, 76, 75, 82, 91, 89. the gr...