jacksolo
12.12.2020 •
Mathematics
Which situation is an example of an observational study?
O A. Finding the number of red jellybeans placed in an average jar of
O B. Having customers fill out a questionnaire about their favorite
O c. Dividing a class into thirds, giving each third a different amount of
O D. Placing different groups of people in different colored rooms and
jellybeans by counting
brand of toothpaste
time to read, and then testing comprehension
recording their mood
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Ответ:
it finding the number of jelly beans
Step-by-step explanation:
Ответ: