Management of a British firm recognize that statistics is useful for business decisions, but do not think it is important to have an in-depth knowledge of it. The firm decides to conduct a survey to determine how usefule statistics are for its business activities. A random sample of managers of levels 1, 2, and 3 are selected from small, medium, and large firms andtheir use of statistical methods (in percentages) are recorded in the following table:

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Management 1 and 2 3 Level Small Firms Medium Firms 18 14 14 42 Large Firms 7 23