Click to draw/clear town borders. Notable locations in Westfield: Westfield Station (A), Echo Lake Golf Course (B), Westfield Volunteer Rescue Squad (C), Union County Fire Science Training Academy (D), Westfield Fire Department Station 2 (E), Westfield Rescue Squad (F), Westfield Fire Department Station 1 (G).
A distribution is said to be symmetric if the relative frequency (or probability) is the same the same distance either side of its centre, m. Mathematically, the distribution of X-m is then the same as the distribution of m-X.The mean and median of a symmetric distribution are equal.The most important symmetric distribution is the normal distribution, which is unimodal and therefore is symmetric about the mode.athematically, the distribution of X-m is then the same as the distribution of m-X. The mean and median of a symmetric distribution are equal. The most important symmetric distribution is the normal distribution, which is unimodal and therefore is symmetric about the mode.
The kurtosis of a frequency distribution is the concentration of scores at the mean, or how peaked the distribution appears if depicted graphicallyâfor example, in a histogram.If the distribution is more peaked than the normal distribution it is said to be leptokurtic; if less peaked it is said to be platykurtic.ach entry in the table contains the frequency or count of the occurrences of values within a particular group or interval, and in this way, the table summarizes the distribution of values in the sample.