What is the correct conclusion for this hypothesis test, Basic Statistics

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What is the correct conclusion for this hypothesis test

"D" size batteries produced by MNM Corporation have had a life expectancy of 87 hours. Because of an improved production process, it is believed 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.

The hypothesis is:
H0: m £ 87
Ha: m > 87
What is the correct conclusion for this hypothesis test?

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Basic Statistics: What is the correct conclusion for this hypothesis test

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Basic Statistics: What is the correct conclusion for this hypothesis test

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Basic Statistics: What is the correct conclusion for this hypothesis test

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