Looking at the Descriptives table, what is the value of the trimmed mean? What p

Question

Looking at the Descriptives table, what is the value of the trimmed mean?

What percent of outliers does SPSS trim in calculating the trimmed mean statistic?

Is the trimmed mean different from the untrimmed mean? If so, why might this be?

13.62 12630 13.67 Percentiles Percentiles 5 10 25 500 90 95 15.36 16.01 17.16 18.78 21.21 24.63 27.45 Age at first b HAverage 17.18 18.78 21.21 Tukey's Hinges Descriptives Statisti Std. Error 19.68 Age at first birth Mean 95% Confidence Interval for Mean Lower Bound 19.44 Upper Bound 19.92 19.35 5% Trimmed Mean 18.78 Median variance 14.33 3.78 Std. Deviation 11.25 Minimum 42.32 Maximum 31.07 Range 4.05 Inter quartile Range 1.59 ,08 Skewness 16 3.75 Kurtosis

Explanation / Answer

the value of the trimmed mean = 19.35

The trimmed mean trimmed 5 % of outliers in calculating trimmed mean.

Yes, trimmed mean is different than untrimmed mean.It is because, the average of 95% percentile numbers are way beyon than means, of the level 27.45 which is far higher than the untrimmed mean 19.68. So, by trimming that 5 % value which are the outliers, the mean of the trimmed come down and get reduced to 19.35 from 19.68 value.

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