Statistics Speech or Presentation Example | Topics and Well Written Essays - 250 words - 4

Statistics - Speech or Presentation Example Standard deviation on the other hand show us how the individual values compares the mean value, the smaller the standard deviation, the closer the samples measurements are to the mean and vice versa (Gravetter and Wallnau 123). With regard then to the standard deviation given, it is evidenced that there is a considerable difference of the samples considered. Different sample numbers and variation of age among the considered students may have occasioned this. Comparing the two calculated statistics with the population statistics clearly shows inaccuracy, the mean deviation of the samples from that of the population is enormous and this shows that sampling was skewed to a section of the population thus the true value could not be reached. This can also be observed with the values of the standard deviation that shows consistent abnormal variation questioning the sampling technique. Referring to the statistics from the samples against that of the population, they do not reflect values t hat are consistent to the central tendency. Central tendency tends to show us where the majority of the data belongs to by use of mode, median or mean (Gravetter and Wallnau 156). Indeed the only way of getting correct statistical results from a data is to consider as much samples as possible against the possible number of population, this will ensure that a larger percentage of the population are considered with possible inclusion of all the extremities, smaller and larger ones narrowing the space for biasness (Gravetter and Wallnau 162). The use of two classes alone or Susan’s class would have considered a group with skewed values distorting the