Question: An engineer has designed a new light bulb to last longer than the old light bulbs her company makes now. The old light bulbs have

An engineer has designed a new light bulb to last longer than the old light bulbs her company

makes now. The old light bulbs have a mean lifetime of 1200 hours. She is planning a hypothesis

test to determine whether bulbs of her new design actually last longer than the bulbs of the old design.

What is the null hypothesis for this study?

H0:<1200 h0:1200 h0:>1200

What is the alternative hypothesis for this study?

Ha:<1200 ha:1200 ha:>1200

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