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An Industrial Researcher Wants to Perform a Test with the Intent

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An industrial researcher wants to perform a test with the intent of establishing that this company's compact fluorescent lamp has a mean life greater than 6300 hours. The sample size is 106 and he knows that σ\sigma =53 hours.
If he set the rejection region to be  An industrial researcher wants to perform a test with the intent of establishing that this company's compact fluorescent lamp has a mean life greater than 6300 hours. The sample size is 106 and he knows that  \sigma =53 hours. If he set the rejection region to be   what is the level of significance of his test? what is the level of significance of his test?

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