The skull width was measured for a random sample of 25 male ancient Egyptians from 4000 B.C.E. (in mm). Some summary statistics and a histogram of the skull width distribution are shown below.

Descriptives Statistic Std. Error skulls Mean 134.16 .793 95% Confidence Interval for Lower Bound 132.52 Mean Upper Bound 135.80 5% Trimmed Mean 133.93 Median 133.00 Variance 15.723 Std. Deviation 3.965 Minimum 129 Maximum 144 Range 15 Interquartile Range 7 Skewness 695 464 Kurtosis -.010 .902 Percentiles Percentiles 5 10 25 50 75 90 95 Weighted Average (Definition skulls 129.00 129.00 131.00 133.00 137.50 139.80 143.10 1) Tukey's Hinges skulls 131.00 133.00 137.00Simple Histogram of skull Mean - 134.16 50 Sid, Dev. . 3.96527 NO25 40 310 Frequency 20 10 0.0 125.00 130 00 135.00 140.00 145 00 150.00 skull