A standardized exam's scores are normally distributed. In a recent year, the mean test score was 1522 and the standard deviation was 315. The test scores of four students selected at random are 1960, 1240, 2200, and 1400. Find the z-scores that correspond to each value and determine whether any of the values are unusual. The z-score for 1960 is (Round to two decimal places as needed.)

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A:

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A:

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A:

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A: The solution is given in the next step.

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A:

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A:

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A: The given equation is W +(7/8) = 6.