Calculate the weighted mean for a distance which was observed 5 times as 256 82 256 79 256 94 256 81 256 78 ft The observations

Question

Calculate the weighted mean for a distance which was observed 5 times as 256 82 256 79 256 94 256 81 256 78 ft The observations were given a weight of 3 1 1 3 and 2 respectively 256 82 ft 156 82 ft 256 78 ft

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