Manuals/calci/TRIMMEAN

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.

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.
This function will give the result as error when p<0 or p>1