Question

Mr. Zuro finds the mean height of all 17 students in his statistics class to be 67.0 inches. Just as Mr. Zuro finishes explaining how to get the​ mean, Danielle walks in late. Danielle is 70.6 inches tall. What is the mean height of the 18 students in the​ class? The mean height of the 18 students in the class is ______ inches.

Answer 1

Mr. Zuro finds the mean height of all 17 students in his statistics class to be 67.0 inches. Just as Mr. Zuro finishes explaining how to get the​ mean, Danielle walks in late. Danielle is 70.6 inches tall. What is the mean height of the 18 students in the​ class? The mean height of the 18 students in the class is 67.2 inches.

In a class: 17 students whose average height is 67 inches. Danielle arrives, who is 70.6 inches tall

New average class size of students: (17*67 + 1*70.6)/18=67.2inches