A data set has the following characteristics: mean: 4. 9 median: 6 mode: 6 variance: 4 the z-score is the number of a data value is away from the.

Zachary has been trying to work on an essay for almost three hours, be he can't seem to focus for more than 15 or 20 minutes at a time. what should he do so that the quality of his work doesnt suffer because of poor concentration and lack of energy