The phrase "are assumed to differ" is correct and usable in written English.
It can be used in contexts where you want to indicate that there is an expectation or belief that two or more things are not the same.
Example: "In this study, the two groups are assumed to differ in their responses to the treatment."
Alternatives: "are expected to vary" or "are believed to be different".
Table 10 in the Appendix allows for a more flexible specification of Eq. (1), where the program's effects are assumed to differ by year.
Though people are assumed to differ on average (u0j) in the outcome variable, we tested to determine whether the effect of distance differed per person (u1j) using a variance-covariance components test.
The two distributions are assumed to differ only in the mean.
The lower level latent classes are assumed to differ in the distribution of the observed responses.
Second, two groups of fathers are compared that are assumed to differ with respect to their responses to a potential traumatic event.
Clearance pathways of inhaled nanoparticles (NPs) from the lungs are assumed to differ from those of larger particles (> 100 nm diameter).
Absolute time was not used because (i) relevant fossil data are not available to calibrate dates in the phylogeny and (ii) the number of generations per year is assumed to differ dramatically between nematode species due to differences in generation time and, given ecological differences (Herrmann et al., 2006; Kiontke et al., 2011), presumed lengths of diapause (dauer) stages.
Offender movement patterns should not be assumed to differ considerably from the movement of the non-criminal population [27].
Generally speaking, energy costs of conformational changes in the in vitro and in vivo situations have to be assumed to differ to some extent.
The plastic bending behaviour and section moment capacity of LSB sections with web holes can be assumed to differ from those without, but have yet to be investigated.
To reflect different modulation conditions between the two heliospheric hemispheres in our numerical model, the enhancement of both polar and radial perpendicular diffusion off the ecliptic plane is assumed to differ from heliographic pole to pole.
