PBSI 301 - EXAM 2 NORMAL CURVE

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7 Terms

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Normal Curve (bell-shaped curve)

  • Symmetrical

    • Most variables are normally distributed

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Asymptotic

Tails get closer to the x-axis
but never touch

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How Does a Larger Sample Size Impact the Curve of a Histogram?

Large sample size leads to a more normal distribution

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Basis for probability

Odds of average > 🐊 odds of extreme

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<p>Normal Curve Depiction</p><p></p>

Normal Curve Depiction

Percentages within a Normal Curve

<p>Percentages within a Normal Curve </p>
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Z-Scores

Uses mean and standard deviation to transform raw values(x)
into a standard score(z)

  • describes how many standard deviations from the mean a score is

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<p>What do the symbols represent in the Z-Score Formula </p>

What do the symbols represent in the Z-Score Formula

  • Z = z-score

  • X = individual score

  • X-bar = mean

  • s = standard deviation