An electrical firm manufactures light bulbs that have a lifetime that is approximately normally distributed with a mean of 750 hours and a standard deviation of 42 hours. Test the hypothesis that µ = 750 hours against the alternative, u +750 hours, if a random sample of 29 bulbs has an average life of 727 hours. Use a P-value in your answer. Click here to view page 1 of the standard normal distribution table. Click here to view page 2 of the standard normal distribution table. Find the test statistic. (Round to two decimal places as needed.)

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An electrical firm manufactures light bulbs that have a lifetime that is approximately normally distributed with a mean of 750 hours and a standard deviation of 42 hours. Test the
hypothesis that u = 750 hours against the alternative, u + 750 hours, if a random sample of 29 bulbs has an average life of 727 hours. Use a P-value in your answer.
Click here to view page 1 of the standard normal distribution table.
Click here to view page 2 of the standard normal distribution table.
Find the test statistic.
(Round to two decimal places as needed.)
Transcribed Image Text:An electrical firm manufactures light bulbs that have a lifetime that is approximately normally distributed with a mean of 750 hours and a standard deviation of 42 hours. Test the hypothesis that u = 750 hours against the alternative, u + 750 hours, if a random sample of 29 bulbs has an average life of 727 hours. Use a P-value in your answer. Click here to view page 1 of the standard normal distribution table. Click here to view page 2 of the standard normal distribution table. Find the test statistic. (Round to two decimal places as needed.)
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