QuestionThe operations manager of a company hired a consultant to look for possible ways to improve workers' productivity. The plan recommended by the consultant was applied to a sample of workers, whose mean productivity was compared with their mean productivity before the plan was implemented. The resulting p-value was 0.15 . Based on this result, which would be the correct conclusion and course of action? the p -value is less than or equal to the significance level. There is insufficient sample evidence showing that the recommended plan increases workers' productivity. The plan should not be implemented without additional study A paired sample $d$ test should be applied inthis case. There is sufficient sample evidence showing that the recommended plan increases workers' productivity. The plan should be implemented to include all workers