CHALLENGE ACTIVITY 5.4.1: Hypothesis test for the difference between two population means. 402216.1927122.qx3zqy7 Jump to level 1 1 An electrician wants to know whether batteries made by two manufacturers have significantly different voltages. The voltage of 74 batteries from each manufacturer were W N measured. The population standard deviations of the voltage for each manufacturer are known. The results are summarized in the following table. Manufacturer Sample mean Population standard voltage (millivolts) deviation(millivolts) A 103 3 B 101 5 What type of hypothesis test should be performed? Select Select What is the test statistic? Ex: 0.12 Right-tailed t-test Right-tailed z-test Does sufficient evidence exist to support the claim the Two-tailed t-test Two-tailed z-test batteries made by the two manufacturers is different at the a = 0.05 significance level? Select v 0.05 1 2 3 Check Next