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The mean is the average value and the standard deviation is the variation from the mean value.
How long students worked on the math problems (APEX)
Standard error is the difference between a researcher's actual findings and their expected findings. Standard error measures the accuracy of one's predictions. Standard deviation is the difference between the results of one's experiment as compared with other results within that experiment. Standard deviation is used to measure the consistency of one's experiment.
A control is the standard to which an outcome of an experiment is compared, but a variable is something in an experiment that can change.
Without the control group, the test is not able to measure the difference with a standard condition
A constant is always fixed and won't change in an experiment. The control is the standard that you are testing against to see how experiment outcomes change when the testing factors are altered.
about 3 metres The standard height for a classroom is 8 1/2 ft.
The part of an experiment that's the standard for comparison is called the Control