There is no agreed definition of an outlier and consequently, there is no simple answer to the question. The number of outliers will depend on the criterion used to identify them. If you have observations from a normal distribution, you should expect around 1 in 22 observations to be more than 2 standard deviations from the mean, and about 1 in 370 more than 3 sd away. You will have more outliers if the distribution is non-normal - particularly if it is skewed.
Yes. If you have a large group that is very similar and 2 or 3 that are not similar, the numbers that are not the same are all outliers
Outliers
Best to use a histogram i think! z scores can probably be used too however they seem more a method of how to transform outliers in workable scores.
To determine the number of outliers in a dataset, you typically need to calculate statistical measures such as the interquartile range (IQR) and establish thresholds (often using 1.5 times the IQR) to identify values that fall outside this range. The exact number of outliers will depend on the specific data points in your dataset. Without more information or the actual dataset, it's impossible to provide a precise count of outliers.
There is no limit to the number of outliers there can be in a set of data.
There is no agreed definition of an outlier and consequently, there is no simple answer to the question. The number of outliers will depend on the criterion used to identify them. If you have observations from a normal distribution, you should expect around 1 in 22 observations to be more than 2 standard deviations from the mean, and about 1 in 370 more than 3 sd away. You will have more outliers if the distribution is non-normal - particularly if it is skewed.
there are no limits to outliers there are no limits to outliers
It depends on how many points you have, if you have 6 or 7 then only one outlier is really possible but if you have done 20 points the 2 outliers could be acceptable, but should still be avoided.
Of course. In a large sampling of data, a relatively small group of outliers is possible.
Yes. If you have a large group that is very similar and 2 or 3 that are not similar, the numbers that are not the same are all outliers
Outliers.
the interquartile range is not sensitive to outliers.
Outliers
The ISBN of Outliers - book - is 9780316017923.
Yes, it is.
"Outliers" by Malcolm Gladwell has approximately 320 pages in its paperback edition.