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Chapter 3 Project: Investigating Relationships

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Atom ode Wowo

on 15 April 2016

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Transcript of Chapter 3 Project: Investigating Relationships

Chapter 3 Project: Investigating Relationships

By: Ayomide Wowo

Graphs
Conclusion & Discussion
The better decision would be the size of the laptop.The correlation between the size of the laptop and the battery life of the laptop was higher than the correlation between the cost of the laptop and the battery life. In the data for cost only 00.15% of the data was accounted for while for size 13.22% of the data was accounted for.
Introduction
In my project I am investigating whether the size or cost of a laptop is better to predict the battery life of a laptop. My two explanatory variables are the size and cost of the laptop. The response variable is the battery life of the laptop. My hypothesis is that, the more expensive the laptop and the bigger the laptop, the longer the battery life. It should have a positive relationship.
Data Collection
I got my data using google. It was from:
http://www.laptopmag.com/articles/all-day-strong-longest-lasting-notebooks
Data
Both graphs have a positive correlation.The graph with the relationship between the size of laptop and battery life has a stronger correlation than the graph with the relationship between cost of laptop and battery life.
Summaries and Interpretations
Cost
a=1.4356E^-4
b=12.5882
y hat=1.4356E^-4 + 12.5882(Cost of laptop)
r=.0390
r^2=.0015

Size
a=.7599
b=2.9274
y hat=.7599+2.9274(size of laptop)
r=.3636
r^2=.1322
Residual Plots
Cost
Size
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