Respuesta :

Step-by-step explanation:

The first eight natural numbers are 1, 2, 3, 4, 5, 6, 7, 8.  The sum of these observations = 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 = 36, and the number of their observations = 8.  Required mean = 4.5

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