Question

the mean and standard deviation of 20 items is found to be 10 and 2 respectively. At the time of checking,it was found that one item 8 was incorrect.calculate mean and standard deviation if (i) the wrong item is omitted.(ii) it is replaced by 12.​

Answer 1

Answer:

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Answer 2

Step-by-step explanation:

This is the correct answer. Mark me as brainliest.