no
yes
Control group.
The homonym for "then" is "than." "Then" refers to time or sequence, while "than" is used to make comparisons.
h
Because you need to see what differs after you test it. You need to be able to make comparisons between the result and the original.
Error bars are often used on graphs to show statistical comparisons.
Error bars are often used on graphs to show statistical comparisons.
Any experiment is associated with a control . This control is actually not a part of experiment itself but is only used to compare the results. for eg in DNA transformation experiments control DNA is also tranformed to analyse and compare the transformation of our required DNA insert.
A variable changes due to the manipulation whereas the control group does not change allowing baseline comparisons.
Yes.
Contents insurance comparisons are used for comparing insurance rates of different companies. You can compare rates from different companies effectively.
B Than is not a preposition. It is a conjunction used to make comparisons.