trimmed mean

Question

The production of Bidri is a traditional craft of India. Bidri wares (bowls, vessels, etc) are cast from an alloy containing primarily zinc along with some copper. The following observations are on percentage copper content for a sample of Bidri artifacts.

2.0,2.4,2.5,2.6 , 2.6, 2.7, 2.7, 2.8 , 3.0, 3.1, 3.2 , 3.3,
3.3 ,3.4,3.4 ,3.6, 3.6 , 3.6 , 3.6, 3.6 , 3.7, 4.4 , 4.6, 4.7
4.8 ,5.3 ,10.1

(a) Calculate a 20% trimmed mean of the data.

Answer 1

Hi George, good question! To take a 20% trimmed mean, delete the highest 10% of the data and the lowest 10% of the data and then take the average of the remaining data.

 

Good luck!