B Use technology to calculate the standard error and then calculate the test statistic. SE = p( 1 - p) + p( 1 - P) = nw Z = (PW - PH) -Pw - PD) = SE C How many standard errors is the observed difference, Pw - Ph, from the assumed mean of differences of zero? D Do you consider the observed difference to be unusually far from the assumed mean of differences? E Use the test statistic to determine the P-value. Remember, you need to compute P-values for two-tailed hypothesis tests differently