Question: Report the correlation between gestation and longevity and comment on

Question

Question:

Report the correlation between gestation and longevity and comment on the strength and direction of the relationship. Interpret your findings in context.

Now return to the scatterplot that you created earlier. Notice that there is an outlier in both longevity (40 years) and gestation (645 days). Note: This outlier corresponds to the longevity and gestation period of the elephant.

What do you think will happen to the correlation if we remove this outlier?

Scatterplot of gestation vs longevity 700- 600 500 C 400 300 200 100 0 10 20 30 40 longevity Summary Statistics VariableN Mean StDev Minimum Maximum gestation 40 194.33 143.39 longevity 40 13.150 7.245 15.00 645.00 40.000 1.000 Correlation Pearson correlation of gestation and longevity = 0.663240

Explanation / Answer

Calculated value of correlation coefficient between gestation and longevity is 0.66324.

This indicates that there is positive correlation between longevity and gestation. Increasing the value of longevity will result into the higher gestation.

The magnitude of this relationship is not very stong as value is not greater than 0.9.

If the outliers are removed, the value of correlation coefficient will be higher and more towards 1. This results into strong positive correlation between two variables.

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