answer.
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
jenyasd209
2 months 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:
babunello [11.8K]2 months ago
5 0

Response:

(a) 3, 5, and 6

Detailed explanation:

In this study, 43 participants will be treated with a gel containing tooth-whitening agents, while the remaining 42 will receive a placebo. Consequently, a placebo is in use.

The selection process for the 43 individuals receiving the gel will be random.

Post-experiment, the whiteness levels of both groups will be compared to analyze the gel's effect.

For true randomness in the experiment, options 3, 5, and 6 are applicable.

(b)

In order for the experiment to be double-blind, the evaluators analyzing the whiteness, as well as the participants, must not know which individuals were given the whitening gel versus the placebo.

You might be interested in
The intersection of planes AMR and CMR is<br> a. MR<br> b. AC<br> c. AR<br> d. none of the above
zzz [12365]
I believe its either a or d

3 0
1 month ago
Read 2 more answers
The numbers 1 through 40 are placed in a hat to determine the order in which students will give an oral report. Event A is being
zzz [12365]

Detailed explanation:

ikwjwjwjeueiesjwhuwuwiwieie

5 0
2 months ago
A piece of climbing equipment at a playground is 6 feet high and extends 4 feet horizontally. A piece of climbing equipment at a
AnnZ [12381]

Response: The following comparison is made.

Detailed explanation:

At the playground, a climbing structure is 6 feet high and stretches 4 feet horizontally.

The slope can be calculated as vertical height divided by horizontal length.

m_1=  6/4 = 3/2 = 1.5

In contrast, a climbing structure in the gym stands 10 feet tall, extending 6 feet horizontally.

Therefore, slope, m_2=  10/6 = 5/3 = 1.67 (approximately)

As such, m_1 < m_2

Thus, the slope of the first climbing structure is less than that of the second.


5 0
3 months ago
Read 2 more answers
On a coordinate plane, 2 exponential fuctions are shown. Function f (x) decreases from quadrant 2 into quadrant 1 and approaches
Zina [12379]

Answer:

g(x)=6(3)^x

Step-by-step explanation:

We are provided with the information that

f(x)=6(\frac{1}{3})^x

Function f is decreasing as it moves from quadrant 2 to quadrant 1, tending towards y=0

It intersects the y-axis at the point (0,6) and goes through (1,2).

Function g(x) also approaches y=0 in quadrant 2, but increases in quadrant 1.

It passes through (-1,2) and crosses the y-axis at (0,6).

Reflection across y-axis:

The transformation rule is identified as

(x,y)\rightarrow (-x,y)

Applying this rule, we derive

g(x)=6(\frac{1}{3})^{-x}=6(3)^x

Then, by substituting

x^{-a}=\frac{1}{x^a}

for x=-1

g(-1)=6\times (\frac{1}{3})=2

for x=0

g(0)=6

Consequently,g(x)=6(3)^x holds true.

8 0
2 months ago
Read 2 more answers
Other questions:
  • Decimal 0.003 is 1/10 of
    9·1 answer
  • If m&lt;DBC=(12x-3)°, m&lt;DBE=(5x+12)°, and m&lt;EBC=(3x+13)°, find m&lt;EBC.
    13·1 answer
  • The owner of a local health food store recently started a new ad campaign to attract more business and wants to test whether ave
    15·1 answer
  • (a) For what values of k does the function y = cos(kt) satisfy the differential equation 81y'' = −4y? (Enter your answers as a c
    7·1 answer
  • A Store-It-All storage facility requires users to enter a four digit code, using numbers 0-9, to get through the gate. You need
    14·1 answer
  • In two or more complete sentences, describe the transformation(s) that take place on the parent function, f(x) = log(x), to achi
    5·2 answers
  • Sarah buys a new bike. The total cost of the bike including taxes is $349. She pays $100 down and then agrees to pay the balance
    5·1 answer
  • A cube with a side length of 1008 units is dropped and completely submerged in a cube-shaped container. If the water level in th
    5·1 answer
  • Suppose you take a class from each of the following four professors: 1, 2, 3, and 4. You write five papers and get the following
    15·1 answer
  • Yasmin bought several items at the discount store. She paid 8.75 percent sales tax, an amount of $4.59, on the total amount of h
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!