CHALLENGE ACTIVITY 4.1.1: Hypothesis test for the difference between two population means. 441702.2006038.qx3zqy7 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. Manufacturer | Sample mean voltage (millivolts) |Sample standard deviation A 131 3 B 127 What type of hypothesis test should be performed? | Select C 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 o = 0.1 significance level? Select 2 3 Check Next