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- Which mean to use and when? - Cross Validated
So we have arithmetic mean (AM), geometric mean (GM) and harmonic mean (HM) Their mathematical formulation is also well known along with their associated stereotypical examples (e g , Harmonic mean and it's application to 'speed' related problems)
- How to read scientific notation output (numbers that include e)?
After running the lm regression model using R, sometime one is bound to get very small P values or values in the covariance matrix Something of the sort: -1 861246e-04 for example in a covariance
- When do we use S. E. M. and when do we use S. D. ?
$\begingroup$ I disagree with Wiki's use of the term "population mean" I believe they mean "null hypothesized mean" That's not even a necessary concept, since a CI can be constructed without specifying a null hypothesis $\endgroup$ –
- What is the difference between mean value and average?
The mean you described (the arithmetic mean) is what people typically intend when they say "mean" and, yes, that is the same as average The only ambiguity that can occur is when someone is using a different type of mean, such as the geometric mean or the harmonic mean, but I think it is implicit from your question that you were talking about
- 均值(mean)和平均值(average)的区别？ - 知乎
均值(mean)是对恒定的真实值进行测量后，把测量偏离于真实值的所有值进行平均所得的结果；平均值(average)直接对一系列具有内部差异的数值进行的测量值进行的平均结果。均值是“观测值的平均”，平均值是“统计量的平均”。
- mean - Difference between standard error and standard deviation - Cross . . .
The SEM gets smaller as your samples get larger This makes sense, because the mean of a large sample is likely to be closer to the true population mean than is the mean of a small sample With a huge sample, you'll know the value of the mean with a lot of precision even if the data are very scattered
- What is the significance of 1 SD? - Cross Validated
The standard deviation tells how "close" the other values are to that mean value, "on average" To calculate the standard deviation you basically find the distance from each point to the mean and then take the average of those distances (really you take the average of the squares of those distances and then take the square root of that average
- expected value - Mean, Average and Expectation - Cross Validated
Some people believe the term "average" to be the mean paired with its standard deviation Some people consider any measure of center to be an average (ie, "the median is an average") But the people who use this context are small Don't know if I've ever met any in real life Expectation: The connotation is that this is a theoretical mean For
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