Ho:=86.4 Ha:<86.4 You believe the population is normally distributed, but you do not know the standard deviation. You obtain a sample of size n=22n=22 with a mean of 81.5 and a standard deviation of 19.1. What is the test statistic for this sample? (Report answers accurate to three decimal places.) test statistic = What is the p-value for this sample? (Report answers accurate to four decimal places.) p-value =