i suggest 14 day rolling average. this chart does not reflect current hot spots

Consider providing a 7-day moving average which is inclusive of all days, including weekends, in the moving average.

It was interesting to hear/see the comparison of number of deaths to population in several states, however it would be more informative to have the percentage of deaths to populations presented, rather than a voice over stating populations. I am not a mathematician and could not keep up with the verbal population statements especially when in the millions. Please figure the percentage and present this information in writing and comparison graphs. Thank you.

I agree. Also, it's difficult to tell when statistics are cumulative over the whole time period going back months or if its for a specific time window.

For example, I was looking for % positive tests in both the Laboratory Testing and in the Summary sections, where today it says we have 22% rate for PCR tests, and it looks like it's being aggregated over the week (because the previous collection period was 1 week ago).

"Date of Specimen Collection: June 28, 2020
Number of tests: 18,639
Percent Positive: 22%"

"Date of Specimen Collection: June 21, 2020
Number of tests: 96,881
Percent Positive: 20%"

But then I see this below, which suggests that it is being aggregated over the entire time period data was being tracked, going back months, because it is for "all people with COVID-19 testing completed in AZ." Or maybe I'm misunderstanding it. Which is it being aggregated by, by week or over the whole time period since testing started?

"Percent positive is defined as number of people with a positive test result, out of all people with COVID-19 testing completed in AZ."

It should be a 7 day average to effectively compensate for the weekend counts being off.

Either a five day or seven day Moving Average would track the course of COVID-19. Display as a line. CDC provides this in their dashboard.

where is the 7-day moving average of new cases?

7-day moving average is commonly used since weekend data tends to be light.