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1. The following are the values of waiting time of 6 customers of a city bank in minutes 5, 5, 6, 6, 8, 9 2, 3, 5, 7, 10, 11
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بهمنه ne 6 Ia 39 5 25 7149 lo 1 100 121 {x² 3081 Ex= 38 mean = {x = 38 - 6.3 6.3333 38 Standard deviation - Soln Eæ? - (Ex)?

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