Math Problem Statement
Solution
import numpy as np
Data extracted from the table in the image
data_with_outlier = { "x": [48, 68.5, 49.4, 62.4, 66.1, 80.5, 69.8, 77.6, 50.5, 82.2, 42.4, 85.1, 72, 74.9, 213.2], "y": [667, -539, 112.7, 423.9, -412.3, -380.3, -468.7, 694.5, 13, 765.5, -854.6, -198.5, -517.3, 604.6, 5625.8] }
data_without_outlier = { "x": [48, 68.5, 49.4, 62.4, 66.1, 80.5, 69.8, 77.6, 50.5, 82.2, 42.4, 85.1, 72, 74.9], "y": [667, -539, 112.7, 423.9, -412.3, -380.3, -468.7, 694.5, 13, 765.5, -854.6, -198.5, -517.3, 604.6] }
Convert to DataFrame
df_with_outlier = pd.DataFrame(data_with_outlier) df_without_outlier = pd.DataFrame(data_without_outlier)
Compute correlation coefficients
corr_with_outlier = df_with_outlier["x"].corr(df_with_outlier["y"]) corr_without_outlier = df_without_outlier["x"].corr(df_without_outlierThe correlation coefficients are as follows:
- With the outlier (): 0.903 (rounded to three decimal places)
- Without the outlier (): 0.149 (rounded to three decimal places)
Let me know if you have questions or want further analysis!
Here are five related questions to explore:
- How does the presence of an outlier impact the correlation coefficient in general?
- Can we visualize the data points to see the impact of the outlier?
- What statistical methods can be used to detect outliers in data sets?
- Is it always appropriate to remove outliers, or are there cases where they should be retained?
- How does the correlation coefficient influence regression analysis?
Tip: Always check for and address outliers in your data when performing statistical analyses, as they can significantly skew results.
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Math Problem Analysis
Mathematical Concepts
Statistics
Correlation Coefficient
Data Analysis
Outlier Identification
Formulas
Correlation Coefficient formula: r = Σ((x - x̄)(y - ȳ)) / √(Σ(x - x̄)²Σ(y - ȳ)²)
Theorems
Linear Correlation
Suitable Grade Level
Grades 11-12, College Level
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