You were tasked to evaluate two medical devices from different manufacturers. The goal of your investigation is to determine if there is a difference in the proportions of sufficient battery levels to operate at the end of a shift. Twenty out of random sample of 200 devices from Brand A still had sufficient battery levels to operate at the end of a shift. On the other hand, Twelve out of another random sample of 200 devices from Brand B still had sufficient battery level to operate at the end of the shift. Test at the 1 % level of significance. The z-score is 0.466 (to three decimal places). The p-value is 0.6412 A (to four decimal places). Therefore, we can not reject A (reject OR not reject) the null hypothesis at the 0.01 significance level that there is no sufficient evidence to conclude that there is a difference between the two medical devices in their proportions of sufficient battery levels to operate at the end of a shift