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
mrs_skeptik [129]
3 years ago
9

A drug researcher wishes to test a new pain medication for effectiveness in treating the pain associated with arthritis. 20 of 4

0 severely disabled arthritis sufferers in a hospital ward will receive the drug. The other 20 will receive a placebo. The experimenters do not know whether any given subject receives the drug or the placebo.
Which of the following principles of experimental design are being followed in this experiment? Check all that apply.

A. Confounding
B. Blocking
C. Control
D. Replication
E. Blindness
Mathematics
2 answers:
maks197457 [2]3 years ago
7 0
Answer: Option E. Blindness

Blinded experiments are conducted to avoid biass from experimenters, whose expectations or preferences might influence the results if they new which group is taking the drug and which one the placebo.
Ronch [10]3 years ago
3 0

The correct answers are Blindness and Control.

You might be interested in
He design on Santana's wall includes 16 pink stripes and 20 green stripes. Find the pink stripes to green stripes?
bija089 [108]
Well the ratio is 16:20 which it 16/20. We can simplify that to 4/5. Therefore the ratio from pink stripes to green stripes will be 4:5
6 0
3 years ago
What is the exact area of a circle whose radius is 9 yd? Enter your answer in the box. Express your answer in terms of
atroni [7]

Answer:

81\pi

Step-by-step explanation:

Area = pi*r^2

Area = pi*9^2

Area = 81\pi

6 0
3 years ago
Read 2 more answers
Which sphere contains the air we breathe? A. atmosphere B. lithosphere C. hydrosphere D. magnetosphere
sattari [20]
The answer to this is atmosphere. 

The atmosphere is the layer of air that surrounds the Earth and is comprised mainly of nitrogen and oxygen. 

So that's why the sphere that contains the air we breathe is atmosphere.

Hope this helped :)
have a great day 
5 0
3 years ago
Read 2 more answers
You deposit $600 in a account earning 5% interest compounded annually. How much will you have in the account in 15 years?
Kisachek [45]

Answer:

$1050 in total including the interest.

Step-by-step explanation:

The answer is 1050 because 5% of 600 is 30 and 30 multiplied by 15 is 450, and 600 plus 450 is 1050

7 0
3 years ago
1) The Boateng family has a sickening house whose layout is shown
ZanzabumX [31]

Answer:

The cost will be $1662.136  

The total square ft of carpeting will be 231.1122ft^2    

Step-by-step explanation:

For the bedrooms,  the dimension from the image is shown as(see attahced)

Bedroom #2= 10"8' x10"4'

Bedroom #3= 10"8' x11"4'

let us convert all dimension to feet and solve for the area of the bedrooms

Bedroom #2= 10"8' x10"4'

Bedroom #2=10.67x10.33feet

Area of Bedroom #2= 110.2211ft^2

Bedroom #3 = 10"8' x11"4'

Bedroom #3 =10.67x11.33feet

Area of Bedroom #3= 120.8911ft^2

The total area of both rooms is

Total area=110.2211+120.8911

Total area=231.1122ft^2

now the cost of one square floor s $8.99

hence the cost of 231.1122ft^2 will be

Cost of carpet = 231.1122*8.99

Cost of carpet = $2,077.67

Given that, because you are a contractor, you will receive 20% off

therefore it will cost

= (20/100)*2,077.67

=0.2*2,077.67

=$415.534

The cost will now be  $2,077.67-$415.534

= $1662.136

6 0
3 years ago
Other questions:
  • Use the comparison theorem to determine whether the integral is convergent or divergent integral sin^2x/sqrt(x) from 0 to pi
    8·1 answer
  • Which system of equations is equivalent to the system of equations shown?
    10·2 answers
  • A newspaper reports that the population mean annual salary of a full-time college professor in a certain region is exactly $127,
    9·1 answer
  • Graph the equation on the coordinate plane.<br><br><br><br> y=1/2x
    11·2 answers
  • ILL GIVE BRAINLIEST PLEASE ORDER THESE LEAST TO GREATEST
    11·2 answers
  • Yasmine bought 6 gallons of apple juice. After filling up 4 bottles of the same size with apple juice, she had 0.3 gallon of app
    5·2 answers
  • Use substitution method <br>3x +4y+175x-2y=11​
    9·1 answer
  • What is the value of the expression below 2,816 x 7
    8·1 answer
  • Brainly so you better do it right
    12·2 answers
  • Which equation is the rule for the pattern in the table?
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!