Answer to Question #12764 in Statistics and Probability for maria

Question

Rhodium
126,4
133.3
131.3
134.2
132.6
135.7
132.5
131.2
133.8
133.3
132.9
133.0
132.1
133.3
133.5
131.5
133.0
131.1
133.5
133.5
131.1
132.4
131.4
133.4
132.3
131.1
131.6
131.2
133.5
132.7
131.9
132.6
131.1
133.0
132.9
132.7
132.2
131.1
132.8
134.1
find the mean,10% and 20% trimmed mean and median and then compare

Answer 1

The mean is 132.42, 10% trimmed mean is 132.48, 20% trimmed mean is 132.53,
median is 132.65. For the trimmed mean it is useful to first sort the numbers
from smallest to largest. The trimmed mean is the mean after you throw out some
extreme values (typically the highest 10% or 20% and the lowest 10% or 20%).For
the 10% trimmed mean, we delete the 4 smallest and 4 largest values, and take
the mean of the remaining 32. For the 20% trimmed mean, we delete the 8 smallest
and 8 largest values, and take the mean of the remaining 24.