2 NeverReady Inc manufacturers thousands of batteries each hour When the manufacturing process is working properly the batteries

Question

2 NeverReady Inc manufacturers thousands of batteries each hour When the manufacturing process is working properly the batteries have lifetimes that follow a slightly right skewed distribution with u 9 hours A quality control supervisor selects a simple random sample of batteries every hour and measures the lifetime of each If she is convinced that the mean lifetime of all batteries produced tha hour is less than 9 hours at the 5 significance level then all those batteries are discarded The sample for a specific hour gives the statistics below Should all the batteries produced this hour be discarded Support your answer with an appropriate hypothesis test 4 points Min 5 6 Max 8 6 8 9 Sx 0 21 n 30 Median 8 8

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