1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Zinaida [17]
3 years ago
8

A tooth-whitening gel is to be tested for effectiveness. A group of 85 adults have volunteered to participate in the study. Of t

hese, 43 are to be given a gel that contains the tooth-whitening chemicals. The remaining 42 are to be given a similar-looking package of gel that does not contain the tooth-whitening chemicals. A standard method will be used to evaluate the whiteness of teeth for all participants. Then the results for the two groups will be compared. 1. After the treatment period, compare the whiteness of the 43 treated adults. 2. A placebo is not being used. 3. After the treatment period, compare the whiteness of the two groups. 4. Randomly select 85 adults to be given the treatment gel. 5. The remaining 42 adults receive the placebo gel. 6. Randomly select 43 adults to be given the treatment gel.
Mathematics
1 answer:
Lina20 [59]3 years ago
5 0

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.

You might be interested in
What is 3/5 + 1/3 I got my Awncer but it says it's wrong ​
Harlamova29_29 [7]

Answer:

E 14/15

Step-by-step explanation:

3/5 = 9/15

1/3 = 5/15

8 0
2 years ago
Read 2 more answers
A​ golf-course architect has six linden​ trees, four white birch​ trees, and three bald cypress trees to plant in a row along a
JulijaS [17]

Total number of trees n = 4 + 3 + 3 = 10. Count the number of each different trees. n1=4, n2=3, n3=3. Number of ways the landscaper plant the trees in a row is = 10 ! / ( 4! * 3! * 3! ) = 3628800 / ( 24 * 6 * 6 ) = 3628800 / 864 = 4200 ways.

Therefore, the trees can be planted 4200 ways

6 0
2 years ago
Help ASAP In a system of linear equations the two equations have the same slope. Describe the possible solutions to this equatio
Troyanec [42]

Answer:

If the two linear equations have the same slope, the equations represent the same line. Since a line intersects with itself everywhere, there will be an infinite number of solutions.

6 0
3 years ago
Solve these equations. Thanks.
Nutka1998 [239]

Answer:

1. 3.572 x 10^(-1)

2. 3.108 x 10^(6)

3. 5.31881533 x 10^(-6)

4. 4.18676122 x 10^(-1)

Hope this helps

8 0
2 years ago
30 tens = ones<br> 30 tens = hundreds
Svetllana [295]

30 tens = 30 x 10 = 300

300 ones = 300 x 1 = 300

300 is your answer

30 tens = 30 x 10 = 300

3 hundreds = 3 x 100 = 300

3 is your answer

<em>~Rise Above the Ordinary</em>

4 0
2 years ago
Other questions:
  • Which correlation is most likely a causation?
    9·1 answer
  • The verticle of a triangle are (2, 18) (-2, -4), and (6,12.
    5·1 answer
  • How many metres would the blue lines be?
    12·1 answer
  • Jamaal is traveling 20 miles an hour slower than Micah. Micah is traveling n miles an hour. Write an expression to describe how
    11·2 answers
  • Can someone please help me please
    10·2 answers
  • PLEASE HELP !! FIND THE INVERSE
    14·1 answer
  • If the total surface area of lidless cubical box is 90 cm square find the length of edge of the box​
    15·1 answer
  • Peyton is going to invest $9,700 and leave it in an account for 16 years. Assuming the interest is compounded continuously, what
    15·1 answer
  • On a family trip to Oman, Tarek drove 300 km in 5 hours. This is an example of a unit rate or a rate? Please tell the correct an
    11·1 answer
  • What is the equation of the line in slope-intercept form?
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!