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The distribution of the test scores on the final exam for POLS 2311 are normally distributed with a mean of 145 and a standard devation

The distribution of the test scores on the final exam for POLS 2311 are normally distributed with a mean of 145 and a standard devation of 12.5 points

a) Find the Z- and for the test grade of 120 and 170, and use the empirical rules to explain the answer.

b) About 99.7% of the students received scores between which ranges?

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