15th February 2024

A new cream has been developed for psoriasis.

A new cream has been developed for psoriasis. To assess the cream’s efficacy, 50 patients with psoriasis were recruited to the study. Lesions on the left arm were treated with the new cream, while lesions on the right arm were treated with topical vitamin D and emollients. Complete resolution of the psoriatic lesions was measured in both arms for all participants. 

Which of the following statistical tests should be considered to identify any significant differences?