Answer: A. The study compares two or more treatments (possibly including "no treatment").
C. The study involves one or more treatment groups and a control group.
Step-by-step explanation:
Here is your answer:
Its scientific notations:
Its negative so your going to the left:
2.8×10^-4
=0.000028
5 cat cards, 6 dog cards......total of 11 cards
he picks a dog on first try
does not replace card....so there are now 5 dog cards and a total of 10 cards..so the probability of picking another dog card is : 5/10