Jump to level 1 The mean voltage and standard deviation of 7 batteries from each manufacturer were measured, The results are summarized in the following table, wll ~l74 Sample mean Population standard voltage (millivolts) deviation(mil[ivolts) Manufacturer 134 5 129 What type of hypothesis test should be performed? Select Left-tailed z-test Paired ttest Two-tailed z-test Unpaired ttest What is the test statistic? [Ext 0123 What is the number of degrees of freedom? IE}: 25 Does sufficient evidence exist to support the claim that the voltage of the batteries made by the two manufacturers is different at the oz = 0.01 signicance level? Select V i Feedback