A classroom teacher gave an ability test and computed the mean, the standard dev

Question

A classroom teacher gave an ability test and computed the mean, the standard deviation and the median for the group. On the basis of these results, the three lowest and the three highest students were recommended for special classes. If the mean, median and standard deviation are recomputed without these six scores, which of the following outcomes will probably occur? O Standard deviation will increase; mean and median will remain the same. O Standard deviation will decrease; mean and median will remain the same. O Standard deviation will increase, mean will change and median will remain the same O Standard deviation will decrease, mean will change and median will remain the same. deviation will decrease: median will change and mean will remain the same

Explanation / Answer

as removing these will decrease spread; therefore it will reduce std deviaiton

stadnard deviation will decrease ; mean will change and median will remain the same

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