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VCE Stuff => VCE Mathematics => VCE Mathematics/Science/Technology => VCE Subjects + Help => VCE General & Further Mathematics => Topic started by: elly39951 on May 13, 2013, 12:39:03 pm

Title: Core - data analysis
Post by: elly39951 on May 13, 2013, 12:39:03 pm

why would 3 median regression be used instead of least squares regression?
Do you think the equations of the two lines would be the same? Explain.
 [3 marks = 3 points] 

Title: Re: Core - data analysis
Post by: Yacoubb on May 13, 2013, 04:41:33 pm

Quote from: elly39951 on May 13, 2013, 12:39:03 pm

why would 3 median regression be used instead of least squares regression?
Do you think the equations of the two lines would be the same? Explain.
 [3 marks = 3 points]

The least squares regression line is affected by outliers in a given data set, whereas the three-median line is not affected by outliers in a given data set. Therefore, if you have outliers in a particular data set, the equations of the two lines would be different and it would be more appropriate to use the three-median line.