Hi there,

I'm struggling to understand part of a assignment that I need to do.

I have to examine whether education has an effect on the total number of kids a woman has.
The data is taken from a survey, surveyed between 1985 and 2009. Each woman is observed only once in the data, hence the women have a different age and might be observed in a different year.
The women are divided into 10 10-year birth cohorts (e.g. a woman born in 1915 is in birth cohort 1911-1920). Education is measured as years of schooling.

"I have to check whether the distribution of education looks reasonable for different birth cohorts. I should conclude that birth cohorts 1, 2, 3, and 10 should not be used in the analysis."

Below is the distribution of education in years of schooling for the different birth cohorts. I can't figure out on the basis of what I should remove birth cohorts 1, 2, 3, and 10. Could anyone help me out? Thank you in advance (:


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