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"d" size batteries produced by mnm corporation have had a life expectancy of 87 hours. because of an improved production process, the company believes that there has been an increase in the life expectancy of its "d" size batteries. a sample of 36 batteries showed an average life of 88.5 hours. assume from past information that it is known that the standard deviation of the population is 9 hours. use a 0.01 level of significance, and test to determine if there has been an increase in the life expectancy of the "d" size batteries. using the above information to answer questions 32-34. what would be your null and alternative hypotheses? Get the answer
Category: science | Author: Abraham Uilleam


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