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 u against the alternative, u # 800 hours, if a random sample of 30 bulbs has an average life of 788 hours. Use a P-value in your answer. Use 0.05 level of significance. 800 hours
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 u against the alternative, u # 800 hours, if a random sample of 30 bulbs has an average life of 788 hours. Use a P-value in your answer. Use 0.05 level of significance. 800 hours
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.5: Comparing Sets Of Data
Problem 13PPS
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use 2 dec places
![2. 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 u
against the alternative, u 800 hours, if a random sample of 30 bulbs has
an average life of 788 hours. Use a P value in your answer, Use 0.05 level
of significance.
800 hours](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Ff41e951e-925d-4438-8d85-2bf03b81ff6e%2F448dc04b-6666-46b5-848b-8210e374e0b7%2Fwrbwlgc_processed.jpeg&w=3840&q=75)
Transcribed Image Text:2. 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 u
against the alternative, u 800 hours, if a random sample of 30 bulbs has
an average life of 788 hours. Use a P value in your answer, Use 0.05 level
of significance.
800 hours
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