Above Average | search
Click here to view Above Average news from 60+ newspapers.
Bookmark or Share- Can mean plus one standard deviation exceed maximum value?One must rely on direct demonstration that it's possible, either a proof in algebra (one could be constructed from the beta example above for example*) or by numerical example (which you have already given), which anyone can examine the truth of for themselves. * whuber gives the precise conditions for the beta case in comments.
- Statistical test for a value being significantly further from the ...Chebyshev's Inequality implies that in any real population it is mathematically impossible for the largest value to be $10^6$ SDs above the mean, but that is what you observed ($0.35 = 10^6 \times 10^{-7} + 0.25$). Therefore the $0.35$ did not come from your population, period. $\endgroup$ –
- Calculating two standard deviations above the meanI have a variable a need to find data points which are two standard deviations above the mean. Example, let say we have: 2, 3, 4, 120, 5. Sample mean=26.11 Stan.deviation=52.11 I have been
- What does it mean, when, three standard deviations away from the mean ...“Three st.dev.s include 99.7% of the data” You need to add some caveats to such a statement. The 99.7% thing is a fact about normal distributions-- 99.7% of the population values will be within three population standard deviations of the population mean.
- distributions - How can you define below average, average and above ...It looks like this particular cutoff (16th percentile is below average, 84th is above) comes from taking $\pm \sigma$ in Normal distribution ("bell-shaped curve"). For example, SAT scores are normalized to have average 500 and $\sigma = 100$. Thus, a score between 400 and 600 will be considered "average".
More
