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Ira Lisetskai [31]
3 years ago
14

What is the difference between an observational study and an experiment

Mathematics
1 answer:
Blizzard [7]3 years ago
4 0

Answer: In observational study observer has no control on the variables but in an experiment experimenter has control over the independent variable to record the change on the dependent variable.

Step-by-step explanation:

In statistics , an observational study is a study in which a researcher just observe effects on subjects in a certain manner without interfering them.

On the other hand an experiment is a process which is done by experimenter to  demonstrate a known fact or create a discovery by applying some methods to the variables  .

The basic difference between an observational study and an experiment is<em> in observational study observer has no control on the variables but in an experiment experimenter has control over the independent variable to record the change on the dependent variable.</em>

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Put these in order from least to greatest 1/2, 1/3, 2/5, 0.6 , o.3
Aleks04 [339]

Answer:

0.3, 1/3, 2/5, 1/2, 0.6

Step-by-step explanation:

6 0
3 years ago
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tank contains 20002000 liters​ (L) of a solution consisting of 112112 kg of salt dissolved in water. Pure water is pumped into t
Ganezh [65]

Answer:

Answer:

t ≅ 5.09 min

Step-by-step explanation:

we have that if in 4000 L/sol there is 132 kg salt and the pumping speed is 12L/s, we must find how much of salt is pumping per second and then find the amount of salt remaining

12L/s*132kg salt/4000L = 0.396 Kg salt/s,  this means that 0.396 kg per second comes out , It should be found that the amount of salt must be drained so that only 11 kg of salt remain

132kg salt - 11 kg salt = 121 kg salt, so

121Kg salt*s/0.396Kg salt ≅ 305.55 s ⇒ 305.55s*min/60s ≅ 5.09 min

Step-by-step explanation:

6 0
3 years ago
A.Pictograph
guajiro [1.7K]

..Answer:

Step-by-step explanation:

...

3 0
3 years ago
1+3x=x+9 solve for x.. Help?
anzhelika [568]

Answer: <em>x=4</em>

Step-by-step explanation:

<em>1+3x=x+9</em>

<em>   -x  -x</em>

<em>1+2x=9</em>

<em>-1      -1</em>

<em>2x=8</em>

<em>Divide by 2 on each side</em>

<em>Final result</em>

<em>x=4</em>

7 0
3 years ago
21.
jasenka [17]

Answer:

b = y intercept

Step-by-step explanation:

y = mx +b

This is the slope intercept form of a line

The m is the slope and the b is the y intercept

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