A medical device manufacturer, such as Stryker Corporation, designs its ICU beds to last at least 10 years. A data from about 115 beds is collected. It was determined that the mean length of time of useful operation of all sampled beds is 11.3 years with standard deviation of 6.43 years. Does this data indicate that average length of time of useful operation is less than the length of time designed by Stryker? The z-score is (to three decimal places). The p-value is A (to four decimal places). Thus, we can A (reject OR not reject) the null hypothesis at the 0.05 significance level that Stryker ICU beds last at least 10 years