| Recent Answers from Joe Engels |
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2008-07-06 percentage: Why is it not 520/1980*100=26.26%??? You can also do 1-(1980/2500)*100 The point is you want to find the percent difference between Mr. R's $2500 per month salary and his wifes $1980 per month salary...
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2007-05-30 Causation: This is important to remeber, Correlation does not imply causation. Which means that although there may be a correlation between the two factors, this does not imply there is a cause and effect relationship...
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2007-05-26 Re: Some questions on standard deviation: This was taken from the Emperical Rule, which says, if the data is normally distributed then about 68 % of the values are within 1 standard deviation of the mean, about 95 % of the values are within two...
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2007-05-24 Unequal variance.. maybe: When using an F-test you are testing for equal variance. This would be approriate in this situatuation. Although a major assumption of the f-test is the data comes from a normal population. If the data...
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2007-05-23 Some questions on standard deviation: Basically, for 1 standard deviation 68% of all lags will fall within 6.1247 seconds. That is what the data is telling you. If I understand you correctly, you want to find a relationship between lag...
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