Question

B. The mean of 36 observations is 12. One observation 47 was misread as 74. Find the correct mean?

Answer 1

Answer:

Step-by-step explanation:

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Answer 2

Answer:

Mean of 36 observations = 12

       Sum of 36 observations = 36 * 12 = 432

 Now, actual Sum = Sum of 36 observations + correct observation - incorrect observation

                                          = 432 +47 - 74 = 405

Hence correct mean = Actual sum of 36 observations / 36

                                          405 / 36

                                              = 11.25

Step-by-step explanation:

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