The mean voltage and standard deviation of 8 batteries from each manufacturer were measured. The results are summarized in the following table. Manufacturer Sample mean Population standard voltage (millivolts) deviation(millivolts) A 141 5 B 135 2 What type of hypothesis test should be performed? Select What is the test statistic? Ex: 0.123 What is the number of degrees of freedom? Ex: 25 Does sufficient evidence exist to support the claim that the voltage of the batteries made by the two manufacturers is different at the a = 0.05 significance level? |Select vWhat type of hypothesis test should be performed? Select Select What is the test statistic? Ex: 0.123 Left-tailed z-test Paired t-test What is the number of degrees of freedom? Ex: 25 Two-tailed z-test Unpaired t-testDoes sufficient evidence exist to support the claim that the voltage of the batteries made by the two manufacturers is different at the a = 0.05 significance level? Select v Select No 2 Yes