The accompanying data represent the pulse rates (beats per minute) of nine students. Treat the nine students as a population. Compute the z-scores for all the students. Compute the mean and standard deviation of these z-scores.

Student Pulse Z - scores

Student 1 77

Student 2 61

Student 3 60

Student 4 80

Student 5 73

Student 6 80

Student 7 80

Student 8 68

Student 9 73

*Compute the z-scores for all the students. Complete the table

(Round to the nearest hundredth as needed.)

*Compute the mean of these z-scores.