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Excel Tasks: In the tab labelled brain size, please compute the following on Excel sheet using the Head Size column.

• Five Number Summary
• Interquartile Range and Lower/Upper Limits for Outlier
• Identify whether any of the values are outliers

Next follow then next steps to form a scatterplot:

• Form a scatterplot that shows the relationship between head size and brain weight. Be sure to include your equation/r-squared value in your scatterplot.
• Use the Excel Regression tool to form a Residual vs. Fitted plot for the data and copy your plot on the original tab. *don't forget to adjust your x-axis

Analysis of Results:

1. What kind of relationship exists between head size and brain weight?

1. Are the outlier(s) of the data set reasonable? Should you omit them?

1. Do you think the other variables would be significant in predicting brain weight along with head size? Why?