Are older siblings more responsible than younger siblings?

it depends what age are they like the younger one is 13 and the older one is15 than both will kinda be both of the same responsible but the older one will probrally be more.but if your talking about a 3 year old and a 12 year old than of course the 12 year old one will be more also counts how they act the older can be less responsible if the younger one has a better attitude and more responsible.