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
Inga [223]
3 years ago
8

Why do scientists need control groups?

SAT
1 answer:
lubasha [3.4K]3 years ago
3 0

Explanation:

A scientific control group is an essential part of many research designs, allowing researchers to minimize the effect of all variables except the independent variable. The control group, receiving no intervention, is used as a baseline to compare groups and assess the effect of that intervention.

You might be interested in
On the CLEP exams, how many points are deducted for skipped or incorrectly answered questions?
Morgarella [4.7K]
C because the points are deducted for skipped
7 0
3 years ago
15. For a random sample of n = 64, find the probability of a sample mean being
mart [117]

Answer:

0.9726

Explanation:

The computation of the probability of a sample mean is shown below:

P(\bar x < 24.3)

To find the probability first we have to determine the z score which is

z = \frac{\bar x - \mu_{\bar x}}{\sigma_{\bar x}} \\\\ = \frac{\bar x - \mu }{\frac{\sigma}{\sqrt{n} } } \\\\ = \frac{24.3 - 24}{\frac{1.25}{\sqrt{64} } }

= 1.92

Now probability is

P(\bar x < 24.3) \\\\= P(z < 1.92)

= 0.9726

Hence, the probability of the sample mean is 0.9726

We simply applied the above formulas to determined the probability of a sample mean and the same is to be considered

6 0
3 years ago
What are the limits of economic science?
Zanzabum

Answer:

I tried my best Answer listed below:

Explanation:

The primary limitation of economics, Chetty argues, is that economists have a limited ability to run controlled experiments for theoretical macroeconomic conclusions. The high monetary cost and ethical standards make these types of controlled experiments impractical.

6 0
3 years ago
Read 2 more answers
Identify at least five different Arts, A/V Technology, and Communications careers that you could pursue in your home state, and
Rudiy27

Answer:Arts, A/V Technology & Communications Career Cluster

Telecommunications Career Pathway

Film and Video Editors

Journalism & Broadcasting Career Pathway

Visual Arts Career Pathway

Explanation:

Plato

8 0
3 years ago
C=
wariber [46]
<h2>Right answer: I and II only </h2>

If we already have the formula to find how temperature measured in degrees Fahrenheit, relates to a temperature in degres Celsius:

C=(F-32)\frac{5}{9}    (1)

We can know the formula to find how temperature measured in degrees Celsius, relates to a temperature in degres Fahrenheit, only by isolating F:

F=(\frac{9}{5}C)+32    (2)

Having both formulas, let’s begin:

I) If we want to prove that a temperature increase of 1 degree Fahrenheit is equivalent to a temperature increase of 5/9 degree Celsius:

Beginning with 1\ºF:

C=(1\ºF-32)\frac{5}{9}=-17.22\ºC

This means: 1\ºF=-17.22\ºC

Now we are going to increase 1 degree Farenheit. In other words, we are going to use 2\ºF:

C=(2\ºF-32)\frac{5}{9}=-16.66\ºC

This means: 2\ºF=-16.66\ºC

Calculating the difference between -16.66\ºC   and  -17.22\ºC:

-16.66\ºC-(-17.22\ºC)=0,55\ºC>>>>This is equal to 5/9 degree Celsius, hence is correct

II) If we want to prove that a temperature increase of 1 degree Celsius is equivalent to a temperature increase of 1.8 degrees Fahrenheit:

Beginning with 1\ºC:

F=(\frac{9}{5}1\ºC)+32  

F=33.8\ºF  

This means: 1\ºC=33.8\ºF  

Now we are going to increase 1 degree Celsius. In other words, we are going to use 2\ºC:

F=(\frac{9}{5}2\ºC)+32  

F=35.67\ºF  

This means: 2\ºC=35.67\ºF  

Calculating the difference between 35.67\ºF   and  33.8\ºF:

35.67\ºF-33.8\ºF=1.8\ºF>>>>This is a proof of the statement, hence is also correct.

<h2 />

III) If we want to prove that a temperature increase of 5/9 degree Fahrenheit is equivalent to a temperature increase of 1 degree Celsius:

Beginning with 1\ºC:

F=(\frac{9}{5}1\ºC)+32  

F=33.8\ºF  

This means: 1\ºC=33.8\ºF  

Now we are going to add \frac{5}{9}\ºF:

33.8\ºF+\frac{5}{9}\ºF=34.35\ºF

And use this value in the Celsius formula:

C=(34.35\ºF-32)\frac{5}{9}=1.30\ºC

This means: 1.30\ºC=34.35\ºF

In other words: An increase in 5/9 degree Fahrenheit is equivalent to a temperature increase of 1.30 degree Celsius, <u>not 1 degree Celsius</u>.

Therefore this statement is incorrect.

4 0
3 years ago
Other questions:
  • Pillow lava is formed when lava erupts
    6·1 answer
  • Which of the following is offered by companies, organizations, an agencies to ensure a good range of potential employees ?
    12·2 answers
  • Which rhetorical device does the author use to suggest the abundance of life and activity in Limberlost environment? A) simple s
    10·2 answers
  • Your family would like to develop healthier eating habits. Which of the following strategies would be the best approach to reach
    15·2 answers
  • What is main object of nstp?​
    8·1 answer
  • According to the table, what is the probability that a student chosen at
    14·1 answer
  • How much pure alcohol must a pharmacist add to 10 cm.
    10·1 answer
  • Big ideas math: modeling real life grade 6 assessment book answer key
    11·1 answer
  • Pat needs to determine the height of a tree before cutting it down to be sure that it will not fall on a nearby fence. the angle
    5·1 answer
  • Why is having an education important to you?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!