This table shows the number of shirts by sizes manufactured in a factory on a particular week. Extra Small Small Medium Large Extra Large 390 470 520 680 440 a) Using the stratified random sampling technique calculate the number of medium shirts that will be selected if we require a sample of 375 shirts. b) A machine packages shirts in bags with a mean weight of of 3kg. A random sample of 20 bags has a mean weight of 3.05kg with a standard deviation of 0.05kg, From the data given , state the value of a i) Parameter ii) Statistic

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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.