The mean lifetime of a sample of 90 light bulbs produced by a company is computed to be 1570 hours with a standard deviation of 120 hours. If µ is the mean of all bulbs produced by the company, test the hypothesis that µ is equal to 1600 hours against the alternative µ < 1600 hours. Test it at 0.05 and 0.10 significance level.
Added by Vincent L.
Step 1
- Null hypothesis (\(H_0\)): \(\mu = 1600\) hours - Alternative hypothesis (\(H_a\)): \(\mu < 1600\) hours Show more…
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