Assume two populations, one of size 15 and variance 12 and the other one of size 10 and variance 7.6, are combined together. If the means of the populations are equal, the standard deviation of the combined population is Select one: Оа3.1 O b. 3.2 О с. 3.25 O d. 3.5 O e. None

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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.