An engineer is comparing voltages for two types of batteries (K and Q) using a sample of 75 type K batteries and a sample of 46 type Q batteries. The type K batteries have a mean voltage of 8.51, and the population standard deviation is known to be 0.344. The type Q batteries have a mean voltage of 8.87, and the population standard deviation is known to be 0.644. Conduct a hypothesis test for the conjecture that the mean voltage for these two types of batteries is different. Let μ1 be the true mean voltage for type K batteries and μ2 be the true mean voltage for type Q batteries. Use a 0.05 level of significance.

Step 3 of 4 : Determine the decision rule for rejecting the null hypothesis H0. Round the numerical portion of your answer to two decimal places.