There are 10 observations x_1, x_2, x_3, x_ 10 in a data. The fir… - Vidyadip

Question

There are 10 observations $x_1, x_2, x_3, \ldots x_{10}$ in a data. The first five elements $x_1, x_2 \ldots$ $x_5$ are replaced by $x_1+5, x_2+5, \ldots+x_5+5$ respectively. Also, the next five elements $x_6, x_7, \ldots x_{10}$ are replaced by $x_6-5, x_7-5, \ldots x_{10}-5$ respectively. Calculate the overall change in the mean of the data.

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Answer

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