Answer:
(a) 3, 5 and 6
Step-by-step explanation:
In the experiment, 43 are to be given a gel that contains the tooth-whitening chemicals while the remaining 42 are to be given a placebo. Therefore, a placebo is used.
The 43 that will receive the gel are to be selected randomly.
After the experiment, the whiteness of the two groups will be compared to see the effect of the gel.
Therefore for the experiment to be completely random, 3, 5, and 6 apply.
(b)
For the experiment to be double-blind, the researchers who will evaluate the whiteness and interact with the subjects, and the subjects would not know which subjects received either the whitening gel or the placebo.
Answer: The answer is C or Median
Step-by-step explanation:
Solving for x would give me 14 and negative 10 which would lead to the problem looking like so 14(-10-4)=140
Answer:
<em>your answer is D lexie will roll an even number roughly 400 times but not exactly 400 times </em>
<em>hope this helps</em>
Your answer : is b (the letter b)