According to a University Center for Logistics Management, 5% of all merchandise sold in the United States gets returned. A Seattle department store sampled 89 items sold in January and found that 7 of the items were returned. If you have the following null and alternative hypotheses for a test you are running: H 0 : p = 0.05 H a : p > 0.05 Calculate the test statistic, rounded to 3 decimal places z =