Which one of these belongs to experimental probability , both , or theoretical probability, your answer choices are can change , must be at least 0 , needs no trials, requires trials, never changes , and can never exceed 1 .

Rachel is studying the population of a particular bird species in a national park. she observes every 10th bird of that species that she can find in the park. her conclusion is that the birds living in the park who belong to that species generally feed on insects. rachel's sample is . based on the sample she picked, rachel's generalization is . reset next