The mean voltage and standard deviation of 6 batteries from each manufacturer were measured. The results are summarized in the following table. Sample mean Population standard voftage (millivolts) deviation(mil|ivolts) What tvpe of hvpothesis test should be performed? What is the test statistic? EX: [1.123 Left-tailed z-test Paired ttest What is the number of degrees of freedom? EX: 25 Twotailed 3'19\" Unpaired ttest Does sufficient evidence exist to support the claim that the voltage of the batteries made bv the tvvo manufacturers is different at the on = {1.05 significance level