Consider 110 single students in a college class as the population of interest. The mean number of different individuals dated in the past month for these students is 2.0. A simple random sample of 10 students was selected, and their mean was 1.5. The values 1.5 and 2.0 are _________ and __________, respectively .

1. Consider 110 single students in a college class as the population of interest. The mean number of
different individuals dated in the past month for these students is 2.0. A simple random sample of
10 students was selected, and their mean was 1.5. The values 1.5 and 2.0 are _________ and
__________, respectively