The Always Run Company advertises that its flashlight battery lasts longer than

The Always Run Company advertises that its flashlight battery lasts longer than batteries made by other companies. We randomly select five batteries from the latest production run of this company and five batteries each from three of its competitors. We then test their lives in a standard flashlight. The results are given in Data 18C (scores are times in minutes). (a) Give H0. (b) Complete an F test (a = .05) and show your results in a summary table. (c) If you obtain a significant F, apply Tukey?? HSD test. (d) Your conclusions? (e) Calculate effect size (etasquared and omega-squared).

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