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Technician A says the EVAP monitor for an OBD-II system determines whether there is sufficient purge flow by varying the purge solenoid duty cycle while monitoring change in STFT. Technician B says the canister vent solenoid must be open during the EVAP pressure test portion of the monitor. Who is correct?
Paired-difference Experiment
A research design where the same subjects are exposed to two treatments, and the difference in outcomes is analyzed.
Degrees of Freedom
The number of independent values or quantities which can be assigned to a statistical distribution or test without violating any constraint.
T-distribution
A probability distribution that is symmetric and bell-shaped, similar to the normal distribution but with fatter tails, used when the sample size is small.
Degrees of Freedom
The number of independent values or quantities that can be assigned to a statistical distribution, often related to the number of elements in a calculation minus the number of parameters estimated.
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