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Pages:
1 page/β‰ˆ275 words
Sources:
2 Sources
Style:
APA
Subject:
Mathematics & Economics
Type:
Essay
Language:
English (U.S.)
Document:
MS Word
Date:
Total cost:
$ 4.32
Topic:

Why Outliers Are Sometimes Called Influential Observations

Essay Instructions:

For this discussion, you will assess the use of various support decision tools and explain why outliers are sometimes called influential observations.
Discuss what could happen to the slope of a regression of Y versus a single X when an outlier is included versus when it is not included.
Will this necessarily happen when a point is an outlier?
Reference
Albright, S. Christian; Winston, Wayne L.. Business Analytics: Data Analysis & Decision Making (Page 309). South-Western College Pub. Kindle Edition.

Essay Sample Content Preview:

Outliers
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Institution
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Why Outliers are sometimes called influential observations
In a bivariate data set, unusual points are those that fall away from the other points in a scatter plot to X or y direction. An influential observation is potential if the value of X is far away from the rest of the data (Albright & Winston, 2014). To determine if an observation is influential, removing the observation makes a large impact on the value of the slope or the intercept (Albright & Winston, 2014).
Outliers are sometimes called influential observation because it has a larger residual. An outlier with y value has a high leverage hence, it influence the regression line. The outlier with y value has unusual x value and y value because of its x value. Therefore, the slope of the regression is affected (Albright & Winston, 2014).
The...
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