I have a long-term timeseries dataset with hourly time resolution. I found daily average values for each day in a week. I could clearly see some weekly variation.

But, I want to ascertain that the weekly variation in daily mean values are statistically significant through computation of p-values.(Ho : There is no weekly variation)

I am unsure which test : t-test, z-test ,f-test ,chi-squared test to use and how to use for a time series.

Any hint, resources would be very much helpful.

p.s. I am using python for data analysis.