StatCrunch logo (home)

Report Properties

from Flickr
Owner: ebeltran1989
Created: May 13, 2019
Share: yes
Views: 24
Results in this report
Data sets in this report
Need help?
To copy selected text, right click to Copy or choose the Copy option under your browser's Edit menu. Text copied in this manner can be pasted directly into most documents with formatting maintained.
To copy selected graphs, right click on the graph to Copy. When pasting into a document, make sure to paste the graph content rather than a link to the graph. For example, to paste in MS Word choose Edit > Paste Special, and select the Device Independent Bitmap option.
You can now also Mail results and reports. The email may contain a simple link to the StatCrunch site or the complete output with data and graphics attached. In addition to being a great way to deliver output to someone else, this is also a great way to save your own hard copy. To try it out, simply click on the Mail link.
Chapter 4 Minitab Project Emissions by year in USA 1990-2008
Mail   Print   Twitter   Facebook

 I first created a scatterplot of the tons of carbon monoxide emissions as a function of the year. Below we see the scatterplot showing a strong negative linear correlation and as X increases, Y decreases.

I also calculated the correlation coefficient, r = -0.99.

The value of r in this exercise means that the results are consistent with the scatterplot that shows a strong negative linear relationship.

The Correlation between Year and Emissions (in tons) is: -0.99480526(<0.0001.)

After testing the significance of the correlation using α=0.05, and 0.0001 is less than 0.05, it shows that there is a significant correlation.

Even if we were to use α=0.01, 0.0001 is less than 0.01 which would show a significant correlation.

Simple linear regression results:

Dependent Variable: Emissions (in tons)
Independent Variable: Year 
Emissions (in tons) = 7708.7248 - 3.820614 Year
Sample size: 19
R (correlation coefficient) = -0.99480526
R-sq = 0.9896375
Estimate of error standard deviation: 2.2638119

Parameter estimates:


ParameterEstimateStd. Err.AlternativeDFT-StatP-value
Intercept 7708.7248 189.54718 ≠ 0 17 40.669161 <0.0001
Slope -3.820614 0.094820646 ≠ 0 17 -40.29306 <0.0001


Analysis of variance table for regression model:


Model 1 8320.3422 8320.3422 1623.5307 <0.0001
Error 17 87.122354 5.1248443    
Total 18 8407.4646    


According to my model, there will be 1.0 tons of carbon monoxide emitted from highway vehicles next year in 2020 and by 2021 no more carbon monoxide should be emitted from highway vehicles. 

I dont think that this will happen so quickly because the alternative to fueling vehicles is to switch to an electrical vehicle, which are expensive and charging stations are not as accessible.

Result 1: Scatter Plot   [Info]
Right click to copy

Data set 1. Emissions by Year from 1990-2008   [Info]
To analyze this data, please sign in.

HTML link:
<A href="">Chapter 4 Minitab Project Emissions by year in USA 1990-2008</A>

Want to comment? Subscribe
Already a member? Sign in.

Always Learning