All Outputs (2)

Investigating Browne's method (2021)
Presentation / Conference
Obodo, S., Toher, D., & White, P. (2021, September). Investigating Browne's method. Poster presented at Statistics at Bristol: Future Reserach and You 2021, Bristol

Results supports Browne’s procedure of pilot sample size determination. However the data reveals that the procedure underestimates and overestimates sample size. Fig. 1 shows 𝛼 and 𝛽 have no practical effect on degree of excess which increases as... Read More about Investigating Browne's method.

A comparison of analytical methods for the two group pre- post design (2017)
Presentation / Conference
Allis, V., & White, P. (2017, April). A comparison of analytical methods for the two group pre- post design. Poster presented at UWE Student Conference, Bristol, England

Simulation demonstrates that for a two group randomized design ANCOVA is more powerful than the gain score approach For ANCOVA with an interaction term the model with pre scores X as a covariate is more powerful than the model with X + Y as the co... Read More about A comparison of analytical methods for the two group pre- post design.