Difference between revisions of "Manuals/calci/TRIMMEAN"
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| − | <div style="font-size:30px">'''TRIMMEAN( | + | <div style="font-size:30px">'''TRIMMEAN (Array,Percent)'''</div><br/> |
| − | *<math> | + | *<math>Array </math> is the array of values to find trim and average . |
| − | *<math> | + | *<math> Percent </math> is the fractional number of data points. |
| − | + | **TRIMMEAN(), returns the mean of the interior of a data set. | |
==Description== | ==Description== | ||
| Line 9: | Line 9: | ||
*Trimmean is also called truncated mean. | *Trimmean is also called truncated mean. | ||
*It is the method of finding average that removes a small percentage of the largest and smallest values before calculating the mean. | *It is the method of finding average that removes a small percentage of the largest and smallest values before calculating the mean. | ||
| − | *In <math> TRIMMEAN( | + | *In <math> TRIMMEAN (Array,Percent), Array</math> is the array of values to calculate the trimmed mean.p is the fractional number that we want to remove from the given set of numbers. |
| − | *For e.g., if | + | *For e.g., if Percent=0.2 for the 20 points data set, then to calculate the <math> TRIMMEAN </math> it will exclude 4 points(20*0.2) from the data set, 2 numbers from lowest value and 2 numbers from highest value. |
*Also this function rounds the number of excluded data points down to the nearset multiple of 2. | *Also this function rounds the number of excluded data points down to the nearset multiple of 2. | ||
| − | *If | + | *If Percent=0.1 for the 30 points data set, then it should exclude (30*0.1) 3 points from the data set. But it will remove one number from top and one number from bottom, so it will exclude only 2 numbers instead of 3 numbers. |
This function will give the result as error when p<0 or p>1 | This function will give the result as error when p<0 or p>1 | ||
| Line 44: | Line 44: | ||
==References== | ==References== | ||
*[http://www.virtualnerd.com/middle-math/probability-statistics/mean-median-mode-range/mean-data-set-definition Mean] | *[http://www.virtualnerd.com/middle-math/probability-statistics/mean-median-mode-range/mean-data-set-definition Mean] | ||
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| + | *[[Z_API_Functions | List of Main Z Functions]] | ||
| + | |||
| + | *[[ Z3 | Z3 home ]] | ||
Latest revision as of 16:27, 8 August 2018
TRIMMEAN (Array,Percent)
- is the array of values to find trim and average .
- is the fractional number of data points.
- TRIMMEAN(), returns the mean of the interior of a data set.
is the array of values to find trim and average .
is the fractional number of data points.
Description
- This function gives the truncated mean of a given set of points.
- Trimmean is a measure of mean that indicates the central tendancy of a set of values.
- Trimmean is also called truncated mean.
- It is the method of finding average that removes a small percentage of the largest and smallest values before calculating the mean.
- In is the array of values to calculate the trimmed mean.p is the fractional number that we want to remove from the given set of numbers.
- For e.g., if Percent=0.2 for the 20 points data set, then to calculate the it will exclude 4 points(20*0.2) from the data set, 2 numbers from lowest value and 2 numbers from highest value.
- Also this function rounds the number of excluded data points down to the nearset multiple of 2.
- If Percent=0.1 for the 30 points data set, then it should exclude (30*0.1) 3 points from the data set. But it will remove one number from top and one number from bottom, so it will exclude only 2 numbers instead of 3 numbers.
is the array of values to calculate the trimmed mean.p is the fractional number that we want to remove from the given set of numbers.
it will exclude 4 points(20*0.2) from the data set, 2 numbers from lowest value and 2 numbers from highest value.This function will give the result as error when p<0 or p>1
Examples
| A | B | C | D | E | F | G | H | I | J | K | L | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 14 | 18 | 21 | 19 | 20 | 23 | 8 | 10 | 7 | 18 | 12 | 11 |
- =TRIMMEAN(A1:L1,0.2) = 15.1
- =TRIMMEAN(A1:L1,0.4) = 15.25
- =TRIMMEAN(A1:L1,0.1) = 15.083333333333334
- =TRIMMEAN(A1:L1,0) = 15.083333333333334
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See Also
References