Question

A company claim that the mean life and standard deviation of the bulbs are 360 hours and 90 hours respectively. A sample of 625 bulbs is chosen. It is found that the mean life and standard deviation of the bulb in the sample are 355 hour and 90 hours respectively. Use these results to test the claim at the 5% level of significance

Answer 1

Statistics

Answer 2

1 sec...

Answer 3

ok

Answer 4

sorry not the fastest person

Answer 5

http://www.instruction.greenriver.edu/dhallstone/courses/math%20256%20documents/Review%20for%20Final%20Spring%202008.doc

Answer 6

This might help...

Answer 7

by the way yur really cute

Answer 8

ikr

Answer 9

@adelyn_helps
Thanks for the help and compliment (;

@tyann1098
Appreciated (: