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anonymous

  • one year ago

I'm reading a research article and am having trouble understanding the following.. "Regardless of whether the book was written by a new or established author, being positively reviewed significantly increased sales; a positive review generated between a 32% and 52% increase in demand (no significant difference between coefficients, z = 1.0, p > 0.30)." What does the z here refer to?

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  1. jim_thompson5910
    • one year ago
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    z is the standard z-score

  2. jim_thompson5910
    • one year ago
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    the way z is often computed is this \[\Large z = \frac{x-\mu}{\sigma}\]

  3. jim_thompson5910
    • one year ago
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    mu is the mean, sigma is the standard deviation

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