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IT 223 -- Apr 24, 2024

Review Exercises

Look at the Bivariate Datasets document to help you with these review exercises.

1. What is a bivariate dataset?
2. What is a bivariate normal dataset? Give a parsimonious description of a bivariate normal dataset.
3. Look at the Bears 2026 Roster: bears-2026-roster.txt. Use R to plot the weight in kilos vs. the height in meters for each player. The conversion rates are 0.3048 meters per foot and 0.4536 kilos per pound.

Correlation

• Practice Problem: With the Bears Roster 2026 Dataset, use R to compute the correlation of the height in meters vs. the weight in meters for each player. The conversion rates are 0.3048 meters per foot and 0.4536 kilos per pound.

Linear Regression

• Practice Problem: With the Bears Roster 2026 Dataset, use R to:
  
  1. Compute the height in meters and the weight in kilos of the Bears players. The conversion rates are 0.3048 meters per foot and 0.4536 kilos per pound.
  2. Find the simple linear regression equation for predicting weight in kilos from height in meters.
  3. Create the residual plot, which is the residuals (y-axis) vs. the predicted values (x-axis)

Project 3

• Look at the project descriptions for Project 3.