The phrase "a tight relationship between" is correct and usable in written English.
It can be used to describe a close or strong connection or association between two or more entities, such as people, concepts, or organizations.
Example: "There is a tight relationship between employee satisfaction and productivity in the workplace."
Alternatives: "a close connection between" or "a strong bond between".
"There is such a tight relationship between sea level and temperature," Horton said.
These companies have benefited greatly from decades of weak or nonexistent regulation, coupled with a tight relationship between big business and big government.
Have a look at this:As you can see, there's a tight relationship between school enrolment in 1900 and income a century later.
They assemble a data set of chaotic episodes in Europe between 1919 and 2009—a mix of protests, strikes, assassinations and attempted revolutions and find a tight relationship between fiscal austerity and unrest.
In a recent report published in The New England Journal of Medicine, he points to a tight relationship between health spending and economic growth: over most of the last six decades, health spending per person has grown roughly 2.4 percentage points faster than the economy.
A tight relationship between food availability and reproduction has been observed in fish (Schneider 2004).
While the great depression and WWII were important shocks that reduced inequality (Piketty 2014), the growth of manufacturing jobs and career ladders, strong unions and a tighter relationship between wages and productivity also stabilized the growth of inequality.
A substantial part of the genetic risk for developing adult- and juvenile-onset IIM lies within the major histocompatibility complex (MHC), and a tight relationship exists between individual human leukocyte antigen alleles and specific serological subtypes, which in turn dictate clinical disease phenotypes.
Secondly, a tight relationship is guaranteed between computation invested and closeness to the reference behavior.
