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The production manager of Tea Cup Manufacturing {TCM} must determine which of two production methods. BEN and ZEN. maximizes the hourly yields for tea cup production. In order to compute the mean hourly yields obtained by using the two methods. the manager runs the production process using each method for several hourly periods. The resulting yields [in kilograms of cups per hourly period) are shown in the following table. \"_ Number of . - duction runs \"-3 {a} The production manager claims that the methods, BEN and ZEN. produce yields with the same amount of consistency. Is there enough evidence to support the manager's claim? Assume the level of signicance is 2%. (h) Estimate with 99% condence the consistency of the hourly yields processed using the BEN method