A research done by a graduating student reports that the average score of University students in statistics course is less than 80. To test this claimr a random sample of 'l 0 students was taken and their scores in the course are recorded as: 65,70; 80, 851 60, 90, 8E], 75, Si 90. What type of test is it? Seiect the correct response: twotailed left-tailed righttailed cannot be determined