Couples who love each other tend to have better sexual relationships with each other. It is found that once couples have a baby, the physical side of their relationship declines. What sort of variable...

Couples who love each other tend to have better sexual relationships with each other. It is found that once couples have a baby, the physical side of their relationship declines. What sort of variable is the baby?

How would you randomly select 10 programmes from the day’s listing of a major TV channel to which you have ready access? How would you randomly select three 3-minute segments from a 50-minute TV programme? How would you randomly select 10 editions of a major Sunday newspaper from last year?