The phrase "a two year test" is correct and usable in written English.
It can be used when referring to a test or evaluation that lasts for a duration of two years.
Example: "The researchers conducted a two year test to assess the long-term effects of the new medication."
Alternatives: "a two-year examination" or "a two-year assessment".
A previous study also found moderate levels of reproducibility during a two year interval (from 1989 through 1991), with a two year test-retest correlation of 0.59.
This paper documents a five year testing program that identified factors affecting the aerodynamic drag (Fd) of alpine skiers.
We have performed a three year testing of the improved curriculum at the pilot upper primary school.
The fleet had clocked up almost a million miles over a six year testing period at that point, so has likely added a further 200,000 miles or so since then — assuming rates of testing remained the same.
First, we calculated inter-test intervals among patients whose previous test(s) was/were non-reactive or who had only non-acute reactive tests for a period of at least two years; tests for differences in inter-test intervals were carried out using linear regression with GEE to account for repeated measures person among those who tested three or more times.
Through the PPTCT programme, Haddeshah received vital medication and did three required blood tests over a two year period.
Recently, New York Governor Cuomo and the New York City transit agency, MTA, announced a three year pilot program to test a mere 10 electric buses.
More than half a million year 6 pupils sat the tests this year.
Over a four year period, six phases of testing were performed to observe the influence of age at loading, applied stress level, mix composition and relative humidity on the tensile creep of concrete.
This is a contrasted result: on the one hand there is a significant improvement over the four years tested, but on the other hand the improvement seems to come mostly from the lower result of participants tested in year 0. This could indicate that spatial skills improve strongly during the first year of the apprenticeship, and then only marginally.
