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Whats the mean of a set of data with the standard deviation of 4, given that a value of 73 has a z-score of 1.5?

Whats the mean of a set of data with the standard deviation of 4, given that a value of 73 has a z-score of 1.5?

a) 61

b) 67.5

c) 67

d) 79

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