John took 4 courses last semester: Physics, Calculus, Biology, and History. The means and standard deviations for the final exams, and John's scores are given in the table below. Convert John's scores into z-scores.   Subject Mean Stand. dev. John's score John's z-score Physics 60 14 81   Calculus 70 12 94   Biology 77 10 82   History 53 16 81

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