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ASHA 777 [7]
2 years ago
5

A double-blind study is one in which neither the researchers nor the subjects know wether the subject is receiving the real trea

tment or the placebo. What is the value of this kind of study?
A. Neither the subjects nor the researchers can bias the results.
B. The researchers cannot replace the placebo with the the real treatment for their favorite subjects.
C. The subjects are not irritated by the fact that they are not receiving the real treatment.
D. Neither the subjects nor the researchers are able to interpret the results.
Chemistry
2 answers:
TEA [102]2 years ago
7 0

Answer:

A. Neither the subjects nor the researchers can bias the results.

Explanation:

As described, a double- blind study is one in which the researcher and his study does not know the person receiving the actual treatment.

Researchers can be bias in their studies as they seek to establish and fine tune results in the way the best favors them. A double-blind study helps to bridge this gap to prevent bias that might be introduced into an experimental set up or while interpreting results.

11111nata11111 [884]2 years ago
3 0

The correct answer is A. Neither the subjects nor the researchers can bias the results.

Explanation:

In regular research studies, the subjects or researchers can manipulate the results or bias these, this in the case of the researches occurs when they manipulate the results of the study based on their interests, prejudices, etc. Also, subjects can manipulate consciously or unconsciously the results if they know whether they are in the group with the treatment or the placebo. However, if neither the subjects nor the researchers know about sho is receiving the treatment of the placebo as it occurs in a double-blind study, they will be more objective and would not manipulate the study or bias the results. Thus, one value of this kind of study is "Neither the subjects nor the researchers can bias the results".

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3 years ago
How to write a balanced nuclear equation on how uranium can disintegrate to Actium​
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Balancing Nuclear Equations

To balance a nuclear equation, the mass number and atomic numbers of all particles on either side of the arrow must be equal.

Explanation:

follows:

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To balance the equation above for mass, charge, and mass number, the second nucleus on the right side must have atomic number 2 and mass number 4; it is therefore also helium-4. The complete equation therefore reads:

6

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image

Lithium-6 plus deuterium gives two helium-4s.: The visual representation of the equation we used as an example.

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2 years ago
Which reaction is more likely to involve a form of combustion (exothermic)? Explain your reasoning.
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The general equation for an exothermic reaction is: Reactants → Products + Energy.

3 0
3 years ago
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The rate constant for the decomposition reaction of H2O2 is 3.66 × 10−3 s−1 at a particular temperature. What is the concentrati
Pepsi [2]

Answer:  3.72 M

Explanation:

Expression for rate law for first order kinetics is given by:

t=\frac{2.303}{k}\log\frac{a}{a-x}

where,

k = rate constant = 3.66\times 10^{-3}s^{-1}

t = age of sample = 15.0 minutes

a = let initial amount of the reactant  = 10.0 M

a - x = amount left after decay process = ?

15.0\times 60s=\frac{2.303}{3.66\times 10^{-3}}\log\frac{10.0}{(a-x)}

\log\frac{100}{(a-x)}=1.43

\frac{100}{(a-x)}=26.9

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3 years ago
What<br>was the initial volume of the hydrogen in cm3?​
svetlana [45]

Answer:

255.51cm3

Explanation:

Data obtained from the question include:

V1 (initial volume) =?

T1 (initial temperature) = 50°C = 50 + 273 = 323K

T2 (final temperature) = - 5°C = - 5 + 237 = 268K

V2 (final volume) = 212cm3

Using the Charles' law equation V1/T1 = V2/T2, the initial volume of the gas can be obtained as follow:

V1/T1 = V2/T2

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V1 x 268 = 323 x 212

Divide both side by 268

V1 = (323 x 212)/268

V1 = 255.51cm3

Therefore, the initial volume of the gas is 255.51cm3

5 0
3 years ago
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