(Solved): A new CFL bulb is claimed to have an average life that is less than 8,000 hours. Suppose the averag ...

A new CFL bulb is claimed to have an average life that is less than 8,000 hours. Suppose the average life of a random sample of 36 new bulbs is 7,980 hours. Assume that the population standard deviation for the life of CFL bulbs is 500 hours. A. \( H_{0}: \mu<8000 \) vs \( H_{1}: \mu \geq 8000 \) B. \( H_{0}: \mu \geq 8000 \) vs \( H_{1}: \mu<8000 \) C. \( H_{0}: \mu=8000 \) vs \( H_{1}: \mu \leq 8000 \) D. \( H_{0}: \mu=8000 \) vs \( H_{1}: \mu \neq 8000 \) Choose the correct set of hypotheses. A B \( \mathrm{C} \) D