z Scores. In Exercises 5-8, express all z scores with two decimal places.
8. Plastic Waste Data Set 31 “Garbage Weight” in Appendix B lists weights (lb) of plastic discarded by households. The highest weight is 5.28 lb, the
a. What is the difference between the weight of 5.28 lb and the mean of the weights?
b. How many standard deviations is that [the difference found in part (a)]?
c. Convert the weight of 5.28 lb to a z score.
d. If we consider weights that convert to z scores between −2 and 2 to he neither significantly low nor significantly high, is the weight of 5.28 lb significant?
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