In Stata, I have, For example,
low physical activity for people aged 18-24: mean=45.5, SD=2.23, number in sample=2672
low physical activity for people aged 75 and above: mean=68.07, SD=3.11, number in sample=1109
and many other groups...
How can I import these numbers and analyze them (e.g. t-test) as they are?