According to a large poll in a previous year, about 80% of homes in a certain county had access to high-speed internet. Market researchers wondered if that proportion had changed, so they took a random sample of 64 homes from that county and found that 48 of them had access to high-speed internet. They want to use this sample data to test H0:p=0. 8 versus Ha:p≠0. 8, where p is the proportion of homes in this county with high-speed internet access. Assuming that the conditions for inference have been met, calculate the test statistic for their significance test. You may round to two decimal places.