Question

the heights of a group of students, in centimeters, are 158, 162, 172,.157, 161.com. A) caculate the mean heaight . B) another student joins the group. his height is 169cm. calculate the new mean height?​

Answer 1

Explanation:

So basically To find the mean you have to add all the numbers and divide by how many numbers you have, but to do that you have to make sure the numbers are lined up correctly so

157,158,161,162,172 ( Correct Order ) Smallest to biggest now add these up

157 + 158 + 161 + 162 + 172 = 810 / 5 = 162

The mean height is 162 cm

The new mean height

Again we're going to do the same thing

157 + 158 + 161 + 162 + 169 + 172 = 979/6 = 163.16666 = 163 cm

Hence the first mean height is 162 cm and the new mean height is 162 cm