z =. x - μ. σ. where x is the raw score, μ is the population mean, and σ is the population standard deviation. The z-score has numerous applications and can be used to perform a z-test, calculate prediction intervals, process control
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X = (z)(SD) + mean. As the formula shows, the z-score and standard deviation are multiplied together, and this figure is added to the mean. Check your answer makes sense: If we have a negative z-score the
Algebra. Solve for z x=y/z. x = y z x = y z. Rewrite the equation as y z = x y z = x. y z = x y z = x. Find the LCD of the terms in the equation. Tap for more steps z z. Multiply each term in y z = x y z
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The formula for z-test statistics for a population is derived by using the following steps: Firstly, calculate the population means and population standard