Can you direct me about studies, and binomial models, and trials.

A behavioral psychologist plans a true or false experimental study with toddlers.

Which statements about this experiment must be true to use a binomial model?

Select all that apply.

Each trial is independent.

Each family can only enroll 2 toddlers.

There are only 2 possible outcomes.

The number of trials is fixed in advance.

The number of toddlers in the study is a multiple of 2

Observers are not in the same room.

The toddlers are all boys or all girls.