Hello,

Solution:

Mean = sum of value in % / Number of Children =  Σx / n

n = 24

So,

Mean  =                             (2.90+3.75+3.57+3.45+3.73+3.71+3.55+3.84+3.72+3.30+3.88+3.62+2.98+3.76+3.61+3.38) / 24    =   56.75 / 24

=2.365

Therefore, the Arithmetic mean for albumin level ( g% ) of 24 preschool children is 2.365

Hope it helps