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In science class, Clare and Lin estimate the mass of eight different objects that actually weigh 2,000 grams each. Some summary statistics: Clare mean: 2,000 grams MAD: 275 grams median: 2,000 grams IQR: 500 grams Lin mean: 2,000 grams MAD: 225 grams median: 1,950 grams IQR: 350 grams Which student was better at estimating the mass of the objects? Explain your reasoning.
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Sangeetha Pulapaka
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Lin was better at estimating than Clare  This is because, Lin's responses were less variable as determined both the MAD and the IQR.



Variability refers to how spread scores are in a distribution out; that is, it refers to the amount of spread of the scores around the mean. When a distribution has lower variability, the values in a dataset are more consistent.


Lin's MAD had a value of 225, which is less than the MAD value of Clare's. So, Lin's MAD value has less variability. Similarly Lin's IQR has a value of 350 grams, which is less than Clare's IQR value of 500 grams. So Lin was better at estimating the mass of the objects.