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Question
Choose the correct alternative:
If X ~ N(9, 81) the standard normal variate Z will be
Options
Z = `("X" - 81)/9`
Z = `("X" - 9)/81`
Z = `("X" - 9)/9`
Z = `(9 - "X")/9`
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Solution
Z = `("X" - 9)/81`
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