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Introducing z-scores the normal distribution Z-scores the normal distribution are used with data that is: Continuou

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Introducing z-scores the normal distribution Z-scores the normal distribution are used with data that is: Continuou

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    1. Statistics 1 1 Introducing z-scores & the normal distribution Z-scores & the normal distribution are used with data that is: Continuous? Use real limits Interval or Ratio level? Use M, SS, ?, & ?2

    2. Statistics 1 2 Frequency distributions & relative frequencies: X = levels or values of the variable. f = observed data. relative f = f/n. Relative frequency: the proportion of observations in a given X interval. .36 or 36% of the observations are in the X=3 interval (2.5-3.5).

    3. Statistics 1 3 Relative frequency: the probability of observing X in a given interval. p(3) = .36 and p(2.5<X<3.5)=.36 Probability of observing an X value = its relative frequency. Probability of observing an X above/below a particular score = the sum of the probabilities above/below the interval that contains X.

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