An electrical firm manufactures light bulbs that have a lifetime that is approximately normally distriIbuted witha mean or 000 hour hours. Test the hypothesis that p = 800 hours against the alternative p 800 hours if a random sample of 30 bulbs has an average life of 788 hours. %3D What is the p value?

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What is the p value? With complete solution. Thanks
An electrical firm manufactures light bulbs that have a lifetime that is approximately normally distributed with a mean of 800 hours and a standard deviation of 40
hours. Test the hypothesis that p = 800 hours against the alternative p 800 hours if a random sample of 30 bulbs has an average life of 788 hours.
What is the p value?
Transcribed Image Text:An electrical firm manufactures light bulbs that have a lifetime that is approximately normally distributed with a mean of 800 hours and a standard deviation of 40 hours. Test the hypothesis that p = 800 hours against the alternative p 800 hours if a random sample of 30 bulbs has an average life of 788 hours. What is the p value?
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