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Frequency distribution a mathematical function showing the number of instances in which a variable takes each of its possible values.False
There is no simple formula to calculate probabilities for the normal distribution. Those for the standard normal have been calculated by numerical methods and then tabulated. As a result, probabilities for the standard normal can be looked up easily.
Z Score is (x-mu)/sigma. The Z-Score allows you to go to a standard normal distribution chart and to determine probabilities or numerical values.
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Numerical data is numbers. Non-numerical data is anything else.