Use the Methods for Inferences About Two Independent Means flow chart interactiveopens in a new tab to answer the following question. When conducting a hypothesis test of the equality of the mean pulse rate of males and mean pulse rate of females, when can the t distribution be used with a pooled standard error? Question content area bottom Part 1 Choose the correct answer below. A. The two population standard deviations are both known. B. It cannot be assumed that the two population standard deviations are equal. C. The two population standard deviations are both unknown, but it can be assumed that they are equal. D. The two samples are pooled together as one big sa