1) one indicator of a outlier is that an observation is more than 2.5 standard deviations from the mean. Consider the data value 80.

(a) if a data set has mean 70 and standard deviation 5, is 80 a suspect outlier? be sure to work that explains your answer

(b) if a data set ha mean 70 and standard deviation 3, is 80 a suspect outlier? be sure to explain the answer

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  1. Z = (score-mean)/SD

    Insert the values to calculate Z.

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