The most important difference between an experiment and an observational study is the fact that; .<u>In an observational study the researcher has no control over the variables while an experiment involves application of treatments to a group and recording the effects.</u>
In an observational study researchers observe subjects and measure variables of interest without assigning treatments to the subjects. The treatment that each subject receives is determined beyond the control of the investigator.
In an experiment investigators apply treatments to experimental units (people, animals, plots of land, etc.) and then proceed to observe the effect of the treatments on the experimental units

4 0

3 years ago

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Pls help with this question

Anika [276]

Answer: A: I'm pretty sure

Step-by-step explanation: if you look at the graph the the 2 and 16 are the only lines where the 0 runs across and its also where the ticket prices are.

7 0

3 years ago

Figure ABCDE has vertices A(−2, 3), B(2, 3), C(5, −2), D(0, −3), and E(−2, −2). Plot the points on your own coordinate grid and

Alina [70]

A) The figure decomposes nicely into 1 rectangle and 2 triangles.

B) AB = 4 units; AE = 5 units.

C) The rectangle whose diagonal is BE has area 4*5 = 20 units^2.
.. The triangle CDE has area (1/2)*7*1 = 7/2 units^2.
.. The triangle BCF has area (1/2)*3*5 = 15/2 units^2.
The total area of the figure is
.. area = rectangle + triangle CDE + triangle BCF
.. = (20 +7/2 +15/2) units^2
.. = 31 units^2

_____
Check:
.. Compare our computed value of area to that listed for poly1 on the left side of the figure.

3 0

4 years ago

Stephen deposited $1800 into a savings account for which interest is compounded weekly at a rate of 3.2%. How much interest will

saveliy_v [14]

I think the answer is D

7 0

3 years ago