The following table gives the distribution of items of production and also the relatively detective items among them, according to size groups. find the correlation coefficient between the number of items and the number of defective items and its probable error. size-group     number of items       number of defective items 15-16                  200                            150 16-17                  270                            162 17-18                  340                             170 18-19                  360                            180 19-20                   400                           180 20 21                   300                            114

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Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.