Normal variables have an approximately normal frequency distribution.
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Q20: Ordinal scales have ranked, unequal intervals and
Q21: Most psychological measurements are ratio scales.
Q22: Different statistics are required for variables with
Q23: Nominal variables have three or more unordered
Q24: Nominal variables and dichotomous variables are always
Q26: The range of a normal curve is
Q27: All normal curves can be divided into
Q28: Approximately 34% of the area under the
Q29: There is a high probability that values
Q30: All normal curves can be converted to
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