Test Hypotheses About a Population Mean with Known Using the Classical

Short Answer

Test Hypotheses about a Population Mean with Known Using the Classical Approach
-A manufacturer claims that the mean lifetime of its lithium battery is 1500 hours. A homeowner selects 40 batteries and finds the mean lifetime to be 1490 hours with a standard deviation of 80 hours. Test the manufacturer's claim. Use $\alpha = 0.05$ .