IDNLearn.com: Your trusted platform for finding precise and reliable answers. Get comprehensive answers to all your questions from our network of experienced experts.
The quality-control manager at a compact fluorescent light bulb (CFL) factory needs to determine whether the mean life of a large shipment of CFLs is equal to 7465 hours. The population standard deviation is 840 hours. A random sample of 49 light bulbs indicates a sample mean life of 7285 hours.
a. At the 0.05 level of significance, is there evidence that the mean life is different from 7465 hours
b. Compute the p-value and interpret its meaning.
c. Construct a 95% confidence interval estimate of the population mean life of the light bulbs.
d. Compare the results of (a) and (c). What conclusions do you reach?
Sagot :
Thank you for contributing to our discussion. Don't forget to check back for new answers. Keep asking, answering, and sharing useful information. Thank you for choosing IDNLearn.com. We’re dedicated to providing clear answers, so visit us again for more solutions.
