The following data represent the number of people aged 25 to 64 years covered by health insurance (private or government) in 2018. Approximate the mean and standard deviation for age. Age 25-34 35-44 45-54 55-64 Number (millions) 25.3 35.4 37.4 29.5 24+35=59/2=30 21.4 21.4x30= 642 21.4 x (30)^2=19260 35+45=80/2=40 36.9 36.4x40=1456 36.4 x (40)^2=58240 45+55=100/2=50 37.1 37.1x50=1855 37.1 x (50)^2=92750 55+64=119/2=59.5 24.1 24.1x59.5=1433.95 24.1 x (59.5)^2=85320.025 179.5 119.5 5386.95 172095.025 5386.95/119.5=45.079 H=45.08 years O=