super - basic question, thanks in advance:

I'm trying to analyze the impact of group session meetings on sleep quality of (preliminary 7, but around 28 subjects eventually) 7 different patients.

Each morning they have assigned the time they slept (in minutets for instance) for a period of 28 days. Meaning I have 7 observations per day, for 28 days.

how would you present the data? what analysis would you recommend?

a simple option I came up with is calculating the mean of each day and then to run a lin reg on the means but it swipes the fact I have 7 observations for each day and maybe weakens the power(?)