Question: If a particular set of data is approximately normally distributed, you would find that approximately: (a) 2 of every 3 observations would fall between 1

If a particular set of data is approximately normally distributed, you would find that approximately:

(a) 2 of every 3 observations would fall between 1 standard deviation around the mean

(b) 4 of every 5 observations would fall between 1.28 standard deviations around the mean

(c) 19 of every 20 observations would fall between 2 standard deviations around the mean

(d) All the above

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