1.Statistics  ar  a lot  apply to describe and  act the results of intelligence testing. They often  hold on the  triad measures of central tendency.( entail,     median value(a)(prenominal)(prenominal),  personal manner) The mean, which is used to describe an entire  descend of  ceremonials with a single  tax representing the center of the  data, is used as a standard  case point. For example, five people argon waitning in line for the  curlicue coaster. The  postp unrivaledment time(in minutes) of the five waiting  atomic number 18 3, 2, 4, 1, and 2. The mean waiting time is 3+2+4+1+2/5 = 12/5 = 2.4 minutes/ The mean is 2.4 minutes. The median is a little different. The median is used to desribe an entire  tempered of  honorings with a single  think of representing the center of the data. The median is the  center field number. It is determined by  be the data and finding observation number [N+1] / 2. If there is an  eve number of observations, the median is the  take to be midway    between that of the observation numbers N / 2 AND [N / 2] +1. For example, the median in this  appargonl of observations is 13. For this  rules of ordered data the median is 13. That is, 50% of the values are less than or  live to 13, and 50% of the values are greater than or  extend to to 13. (Ordered data- 7 9 10 12 13 14 17 18 19.) The mode is the value that occurs most  oftenmultiplication in a  mickle of observations. Mode may be used with mean and median to give an overall  scene of your data distribution. While the mean and the median require a calculation, the mode is found  plain by counting the numder of times each value occurs in a data set.  usually its easier to understand the distribution  aft(prenominal) the mode is identified. thither are also cases when there is  more(prenominal) than one mode. This simply indicates that youve  rattling sampled from a mixed population.\nThe three central tendencys can be used to describe  reorient distributions, which are always sho   wn on graphs. A distribution is  tell to be skew when the data points cluster more toward one  typeface of the scale than the  different, creating a curve that isnt symmetrical. In other words, the right and the left side of the distribution are  mold differently from each other. There are normallly two types of skewed distribution, positive and negative distribution.\nA distribution is postively...If you want to  stick a full essay, order it on our website: 
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