The 8 high-capacity rats had mean blood pressure 89 with standard deviation 9; the 8 low-capacity rats had mean blood pressure 105 with standard deviation 13. (Blood pressure is measured in millimeters of mercury.)
The two-sample standard error is: _____
The two-sample t statistic for comparing the population means has value: _____
(Give your answers to two decimal places.)
Recall that two-sample standard error is defined by both sample STDs and sample sizes. The t statistic depends on both means and two-sample standard error.