Questions and Answers

NORMAL DISTRIBUTION and LINEAR REGRESSION?

Question: If I have an equal number awkwardly residues (outliers) above and below a trendline of linear regression of 28 days over a period of 3500 days, that means that my data tends to occupy a normal distribution 28 days?


Answer: No, of course, the distribution may still be shifted to one side. To see if the residual distribution is normal, you can see if the histogram and their fragmentation is normal.

Another control is the following: calculate the mean and standard model S residues. The average should obviously be zero.

difference between a simple linear regression equation and the regression model?

Question: whats the quarrel between the simple linear regression equation and the regression model other than the equation itself? examples of unalike situations where i would use one and not the other??!


Answer: The miniature contains population parameters. You ise it when you are describing the underlying shape of the rekationship between population variables.

The equation contains unbiased estimates of those parameters based on specimen data, usually via the Least Squares estimation but sometimes maximum strong estimation. You use it after



Fitting a Linear Regression Line to Data on the TI-84

This is a continuation of the last video, "Plotting Statistical Facts". It shows the steps for how to fit a best line using the Linear ...

What is Causing Global Warming?

Note that the numbers provided in this review post are best estimates from each paper.  For the sake of comprehensibility we have not included error bars, but we have provided links to the original fact-finding for those who would like to see the uncertainty ranges in each estimate.

A Quick Look at the Diversified Effects on Global Temperature

Most of the studies discussed below looked at the same few influences on far-reaching temperature, because they are the dominant effects.

As we know,  human greenhouse gas (GHG) emissions  heated the planet by increasing the abundance of greenhouse gases in the atmosphere, thus  increasing the greenhouse clout .

Solar activity  also warms or cools the planet by increasing or decreasing the amount of emanation reaching the Earth’s atmosphere and surface.

Volcanic vigour  generally cools the planet over short timeframes by releasing sulfate aerosols into the feel, which block sunlight and reduce the amout of solar radiation reaching the exterior.  However, unlike many greenhouse gases, aerosols are washed out of the feeling quickly, mostly after just 1-2 years.  Thus the main volcanic crashing on long-term temperature changes occur when there is an extended full stop of particularly high or low volcanic activity.

Lose a tick, gain a tick

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EconomicPolicyJournal.com: Using Twitter to Forecast the Future

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